Does the Past Still Exist?

[@Master_Therion]

I've been patiently waiting for Sabine to make a video on this topic. It's about time.

[@brothermine2292]

It had to happen.

[@sparkyfromel]

it's all in the past now

[@FarfettilLejl]

This video had always existed, you just needed to wait for it

[@MeppyMan]

I see what you did now.

[@w3vjp568]

Dad?

[@roboliver623]

My teenage son passed away from an AVM stroke recently and I'd like to believe that part of him still exists out there in space-time.

[@QUBIQUBED]

Sorry for your loss.

[@HoneyBunches100]

Sending love and light ✨✨✨

[@garychambers5850]

Without a doubt, your son is so much alive in Heaven! ✝✝🙏🏻🙏🏻

[@pressureflipin1992]

Sorry for your loss, I believe that, that is a thing. I always have.

[@ελευθερία-ε2ο]

Energy never seizes to exist, it transforms. - Einstein

[@Gliese380]

The past haunts me every day, whether it still exists or not.

[@stephenpalmer-zh9dq]

it is ALWAYS THERE

[@margaretmorrissey2714]

It's not the past doesn't haunt us, it is us who haunts the past.@@stephenpalmer-zh9dq

[@stratocasterblue]

Your thoughts are not you

[@SsuperNnova]

Felt

[@stratocasterblue]

If you start exercising everyday the bad thoughts will stop but you have to everyday, its a way of telling your mind what its going to do

[@Nick-l3r6h]

Time is man made. Its a label for moments. From very quick and brief moments and very very long moments. And time feels different for people, if I'm fully focused on a task and not looking at a clock, time seems to fly by, but for someone constantly looking at the clock time seems to be going slow. Therefore if you didn't know about time , we could have so many moments and would remember them better probably.

[@grandnatty172]

Who else is watching this in 1950?

[@rmoacreyzeus]

😅

[@AndyRamirez-g5d]

I'm watching in the year of our Lord 3084

[@surfingonmars8979]

1950??? WOW….how is it in the future!?!?!??!

[@saadshinobi3859]

Imagine if it's not a joke and he's really from 1950 💀

[@AndyRamirez-g5d]

@@saadshinobi3859 The question of time, does it exist, or not , is still being debated in the year 3084.

[@kurisutofusan]

This is the first video I see on this channel. This is very refreshing to have explanations without all the usual background music, hyperactive ton of speech, or lots of graphics moving around! The calm tone of the video is very good for learning!

[@whitetornado603]

Same here. perfect for learning

[@sonyavincent7450]

Absolutely love videos without background music.

[@rupes96]

I agree, ton of video looking for watch time and less explanation.

[@mireazma]

Because she's not American. I'm glad there's someone else who hates the "hyperactive tone of speech" 👏

[@MakiPavlidis]

I do love her channel's videos, and this is a big reason. However... the recent hydrogen power video would have greatly benefitted from 90% less "under pressure" gags. 🤷

[@Chrisamusic1]

YES it does! I'm sitting here in the quiet English countryside, on a dark winter's night, looking high above me, into a black sky full of stars; many of which are now dead - but because of my unfathomably distant vantage point, are still up there shining, still ‘alive’. Could it then follow that an alien being sat on the other side of the galaxy, looking our way through some kind of ‘advanced super telescope’, could maybe - just maybe, see my late mum and dad, meeting for the very first time on that dizzy late summer's evening they used to tell me about? Believe it; somewhere, everyone and everything is still alive. ❤️

[@nautilus1872]

Thank you for writing your message, I took more from your comment than the video. Very nice and comforting.

[@Chrisamusic1]

@@nautilus1872 Thank you.

[@Jgriffin0808081]

I got a lot from your comment aswell, thank you

[@Muirton66]

Very thought provoking and a lovely comment.....good luck to you.

[@Sashazur]

That alien would be seeing your parents exactly the way we see distant stars- something that happened a long time ago and of which we can only see an image. That is still “reality”, but it’s beyond us in a way; we cannot interact with it or influence it.

I think it does exist, on a different plane, not the one we are currently experiencing, and entropy prevents that from ever occurring from our perspective. In other words Time lines cannot cross, nor intersect, as long as everything in the Universe is trending towards disorganization 😮. Trippy 😊

[@christinablacken3043]

This video made me realize how often we are watching the past. All KZbin videos we watch in the present were made in some recent or distant past and can be played actively as if they are now in the present. All media and entertainment that’s recorded is that way. I think that’s why stories play such an important role in human development - story is time travel.

[@darith770]

Thanks Capt Obvious

[@UNIRockLIVE]

Only if its honest

[@UNIRockLIVE]

​@@darith770poor trolly mad in the comments

[@stuart23969]

History books can take me back

[@the_kombinator]

Memories too.

[@SuperWingram]

I do love the dry humor woven into the ‘story telling’ and then referred to again randomly…a stand up comic schtick that amazingly turns a physics lecture into a conversation between friends. Brilliant.

[@mokeish]

Physicist humor =]

[@davidjoseph7142]

Does the past still exist? Depends on whether you remembered to hit save

[@miashinbrot8388]

Yes, I love Sabine's dry humour also. The first few times I watched her videos I didn't notice it, because it's subtle -- but it's worth watching for.

[@miashinbrot8388]

@@mokeish Not quite the same as math humour, but it's all relative. ;-)

[@lnyitrai]

I love (and respect) her, but I think all the puns are horrible, borderlining disturbing.

[@kylebeetham3679]

If the past doesn’t exist then why is my wife still mad at me for leaving her car lights on 12 years ago?

[@DiscipleofHim]

Because she has not learned to forgive and forget.

[@mosethegreat7415]

@@DiscipleofHim😂😂😂

[@infinitekeys1603]

Checkmate

[@METVWETV]

If that's all she's mad at you about..... COUNT YOUR BLESSINGS!

[@NESADDICT]

It’s because time is stacked and she technically still mad.

[@liamlynch2115]

It exists only in people’s memories. If you do something you regret, your brain reminds you about it and if someone who witnessed it brings it up to you or someone else, it’s regraded to existence.

[@robertbrighton9797]

I’m watching this now, and it was made 2 years ago. But right now I’m watching this video so the past must always exist when it’s captured as a recording

[@Jeremy-Ai]

It exists, there is something irreplaceable and irrelevant to it, perspective and effort to responsibility have something to do with all

[@jctackaert7716]

@@Jeremy-Ai eh, no. That recording was made 2 years ago, and is still existing in the 'now' as you are now watching it, or at least 2 weeks ago so that now doesn't exist any more in the 'now' that I'm writing this comment. And soon that moment will also be gone to be replaced by whatever I'll be doing next today, but that recording will still be there if anyone wants to watch it in some future 'now' moment. Crazy, isn't it ?

[@shugyosha7924]

Relative to me, you wrote your comment in the past.

[@Docconklin3276]

Time is what we can observe. We all have different perceptions of the passage of time. To some life is going fast and to others its moving slow.

[@Jeremy-Ai]

Yes From my perspective responsibility and effort “appear” to be fundamental. It is frustrating, powerful and beautifully terrifying. From my perspective it is deeply unsettling, as I am the beholder, being measured and am responsible regardless of what I see around me at any moment. It would be more comfortable if I could hold anything else responsible…. However the longer this persists the more responsible I must remain. Aa long as I remain, I am responsible (not to fix what I perceive at any moment but add any value at all while it persists to “move the needle” in a positive outcome towards a singularity where I am removed from this equation. I am responsible for a positive outcome regardless of what happens or who is involved. I must protect life, teach respect and responsibility and set a positive example for powerful technologies that require a positive outcome…. even I am alone in doing so. “We are all responsible “ “I will continue to assist and be accountable regardless of others until I am removed and others supporting or opposing my nature arrive to replace us” I must be a positive influence, this is not easy. But… “Nothing good ever comes easy… it only appears like it does” Jeremy

[@FailBucketFilms]

This starts to make sense when you think about how we percieve stars. If we observe one star that goes supernova 5 million light years away, and then another star that goes super nova 6 million light years away, each of those events happened a million years apart, and we just happen to be at the oberservable point to witness each at the same time.

[@phantasticmrphasma9874]

This is the problem with knowledge and research. Some people are not naturally intelligent enough to comprehend it. Some ask “if a tree falls and nobody is there to hear it, does it make a sound” This stupid ‘but how do we know’ mentality reveals those who lack intuitive intelligence. It is a self-centric viewpoint. Light exists. Light travels at particular speed. It takes a relative (i’ll use the word) duration for light to travel a set distance at that speed. Yes those two events happened, at a duration we measured to be, a million years apart. These things are true. Focusing on the ‘meaning’ of this is self-centric. Those things happened and those were the factors. But that does not mean time exists or that the past still exists. The explosion that caused the light happened and then ceased, but the light created continues. I don’t know how or what exactly causes these phenomena or if existence is finite or not or even if there IS actually a creator, but it’s the ego that drives people’s theoretical wandering, beyond the realms that we are capable of. Time does not exist. It is merely a word we used to label a duration of moments. Time travel will never be possible in any way other than a technical way (ie. Australia are ‘technically’ in the future - but they are NOT in the future, they are in the same place, just at a different distance so are subject to different factors. Some people will get what i’m saying here, and some people aren’t capable, as they can only grasp things through technical language, limited to the definition of said language without the personal means to interpret the grey area. Objects exist before the labels we give them, and the objects are the inescapable truth, but the language can be inherently flawed

[@phantasticmrphasma9874]

I hadn’t even watched the video when i wrote that. 5 minutes in: “how do you know your phone is there? You don’t” 🤦🏻‍♂️ ‘I think therefore i am’ - the ultimate self-centric expression of ego through philosophy

[@mexreax4493]

We don't even know if that is true.

[@bombomos]

​@@mexreax4493 it's true. Light has a defined and observable speed. We can only see things through light. So anything that happens a far enough distance is the after image we are observing. Take the sun for example. It takes light 8 minutes to travel to earth from the sun. That means that if something like a planet passed Infront of the sun. We would still see the planet Infront of the sun when in reality the planet at that specific time has already moved out of the way of the sun.

[@MuchCow9000]

Thar "old" light doesn't exist. What we see isn't the old, it's the new part of the old. This argument is parallel to the river argument. In philosophy, the river argument states that if you step into a river, you aren't stepping into the same river twice since its constantly changing, but yet we call it the same river. The same can be applied to this. We can label the light old since it comes from the "old star". But the light has changed many times before it got to you. Therefor the light isn't really old, it's new.

[@finaleoftheseason]

It's like a book or a movie on your computer. The beginning and the end is already there. But the people in it don't have a clue. Just like us. Since we're stuck in the 3rd dimension, we perceive things bound to time. To get out of it, we need a different form of body with a different set of new senses. Which we couldn't get until we die. So, "Does the past 'still' exists?" is like asking "Is Dumbledore 'still' alive?" On what page? Because he lives and he dies, everything all at once in the book.

[@flaviomrp]

EXACTLY

[@SKIDMARKBROWN]

Nice

[@HelloImCrimson]

Except, this is not how it is.

[@micnorton9487]

Finale, not QUITE, if you were only living in 3 dimensions, there would be no change because there is no time... If you're only allowing three dimensions, the screen you're looking at right now is reality because you can see Sabine talking in 2 dimensions and she's MOVING... the only difference between either 5 seconds ago and now or now and 5 seconds from now in 4 DIMENSIONS is that the universe has gotten bigger,, matter and energy have gone on their dances together with the irreversible fusion of hydrogen and expanding through space-time,, meanwhile time and space seem to stand aloof since contemporary theories now speculate that the universe, or the substrate or whatever you want to call space, existed before the Big bang and the only thing we have to measure Time by is the expansion of matter, and the eventual decay of everything into first, the positronium sea in a universe beyond all comprehension of size,, with eventually at Year 10 to the 130th power AD ,, random photons neutrinos and maybe some electrons or other leptons that are so widely scattered that no interaction is possible, the universe is totally dark and chilled to absolute zero, and entropy peaks at 1... there, according to Prof Dave Darling, since there is nothing to measure past from present from future anymore, "time is - uncertain."

[@RealSteveLarry]

Fake news there is no outer space and 1/2/3 dimensions exist together but not 4/5/6etc until your there. It’s also an energetic spiritual thing. You believe the fake NASA mkultra programming bud.

[@cyrushawkins4234]

I think it doesn’t, because like light never really disappears, like if you travel far enough away and zoom in enough, you could see as far back into time as you want or at least what your technology could do. 😅 But if they were still real places, I’d be able to touch myself, like meet myself and literally touch me from the past. Like in no scenario, can I imagine time allowing me to do that. But I suppose it makes sense in your head, if you could time travel you could meet yourself. That’s what I think, and I’m still in the intro just so yk. 😂

[@edwardsp1916]

What blew my mind is that when Sabine gave examples of 'now', she knew I was watching the video. Amazing, great video.

[@deciduousrex1219]

You hadn't disappeared yet.....

[@DukeJon1969]

It's uncanny

[@struggleboy2927]

🤯🤯🤯🤯🤯🤯

[@dylanmorrow263]

This gonna blow your mind.. but when you read this you will be watching again 😱

[@linuxbeastmaster9192]

Time is irrelevant what happened already happened, what will happen will happen, understanding this will free you from the clock. If time was relevant talking about this would be a waste of time.

[@sandataonline]

How did the KZbin algorithm detect my existential crisis?

[@mckennasweda3614]

Because the same thing that created the algorithm created your existential crisis.

[@mynameislove1704]

i just want to be happy😭

[@vhawk1951kl]

What the fcuk is an "existential crisis"?-Some form of hypochondria?

[@findsharon]

KZbin knows all.

[@TGBurgerGaming]

Data from across the web and sensors in your phone that monitor your behaviour. You can turn them off in your phone settings.

[@hraith]

As a working class layman, thank you for making this topic more accessible to me.

[@Rockhoundingcolorado]

The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.

[@Rockhoundingcolorado]

@Dankenstein not a comedian.

[@cdes68]

Suddenly @Dankenstein is interested.

[@arkeusalexander9054]

@@Rockhoundingcolorado Nop time as we know it is just a mere creation to God. He is far beyond what can ever imagine.

[@Rockhoundingcolorado]

@@arkeusalexander9054 Well you, your just talking, I hear no theory other than cult Christianity?

[@notbad2440]

We will never without any Doubt ever be able to travel forward or back in time.

[@painisvergina3693]

This woman can literally talk about anything and my concentration will never break

[@fidacuca]

Not ugly too.

[@rudolfvenema7815]

@@fidacuca Thanks because she is AI and not a real person

[@_TheDarkHalf]

@@rudolfvenema7815is she really? It’s scary I have to ask lol

[@worldsdumbesttrumpturd....3143]

​@rudnoolfvenema7815

[@Beaneabean]

@@fidacucawomen dont exist to be pretty. The more you know

[@richclarke1523]

Also notice that our memories can have differences in this manner. My memories of 50 years ago ( I am 80 ) are in a distant past...but the things I did, that I wish I hadn't, such as being rude as a teenager to someone, and we never forget, is as if it was yesterday.

[@RoseyTucker]

@richclarke1523 Hi Rich, it was so good to read your comment! I hope you can at least find some comfort in the fact you remember your rude teenage years with regret. It means you've gained the empathy that you lacked in the past. You should feel good about that, since so many people still have not evolved from their bad behaviour. And even worse they have no self awareness, and they have no clue of how others perceive them.

[@valicourt]

I have forgiven you

[@morganmiller7777]

Because the human brain is unbelievably flawed

[@Lmfleaflicker]

Regretting your rudeness for so long I bet you are forgiven

[@musicjunkie274]

That has nothing to do with physics or time as a physical constraint. Also shouldn’t that answer the question of the video? If you remember something as if it happened yesterday, then why would you doubt that the past exists?

[@jimihendrix4376]

Not exactly sure about what you said but i did enjoy the way you said it.

[@bvbxiong5791]

she lost me at the intro when i didn't have enough time to read where the little hand and the big hand were pointing to.

[@jesusislord-ht1nj]

You have to be a Godless moron to think anything she said is worth more than falling asleep to.

[@BillKapriII244]

Lmao

[@DragonballZTime]

Same brother.. I had to have a fap session bc she was bloody hot talking. The video was over after it. I guess she is the past now

[@THIRV]

When people in my family, and friends, are beyond sad when someone has passed away, I’ve been saying for many years that time is relative….they’re not here NOW, of course….but they’re still alive! It’s just that it’s Back Then. They’re still there, living their lives, doing their thing, endlessly, it hasn’t been erased, it’s just a matter of perspective. Someone watching from a distant system will see our planet as it was a number of years ago, they’ll see my parents still alive and well, living their lives. What’s gone in our past is of course not revisitable, but it can be remembered, and we can teach the things learned. And their DNA lives on, too. Nothing is forever, everyone’s line ends eventually, but it’ll always be there in the past. And who is to say we haven’t all had our lives billions of years ago before the Big Bang, the universe had existed, we had lived, then the universe imploded, now we are going again. In many billions of years from now, there may be another implosion, nothingness, then big bang and we live again. Might explain those deja vu feelings. As would the multiverse theory, parallel lives, the same but different. Ultimately though, despite my ramblings, we are just creatures on a spinning rock. We must ultimately try NOT to overthink LoL, and just enjoy life for what it is.

[@AICoffeeBreak]

When Sabine casually covers the question you have always been wondering about. 😁

[@vhawk1951kl]

did nobody ever suggest you that it is ugly to end sentences with prepositions flapping about pointlessly uselessly and uglily at the end of sentences

[@wiseguy8828]

@@vhawk1951kl you are missing the word “to” in your sentence, and “did nobody” is awkward phrasing, I would have gone with “has anybody”

[@vhawk1951kl]

@@wiseguy8828 Ah, if you please, so the fcuk what?

[@peanutnutter1]

@@vhawk1951kl There needs to be a comma between pointlessly and uselessly. Plus a capital letter at the start of your sentence and a full stop to close your sentence.

[@vhawk1951kl]

@@peanutnutter1 from where do you get such weird ideas? - I don't give a damn about nonsense and trivia like that.

[@NeonVisual]

Time is a fluid, like a stream flowing in one direction. Anything with mass creates drag, causing time to bend around it like a big rock in the stream. Only things without mass can move freely in the stream at the same speed as the stream itself, and thus it doesn't experience time at all.

[@gerogyzurkov2259]

Oh didn't know u looked at this

[@bootre9148]

Where is the start of the stream and where is the end?

[@NeonVisual]

​@@bootre9148 It began to flow into our universe at the big bang singularity, it doesn't have an end, but can flow out of our universe through black hole singularities where time effectively comes to a complete halt as the superfluid leaves spacetime.

[@themightybuzzard3088]

So if I gain mass, I'll live longer? Sounds good to me.

[@jpd8]

Or maybe it's all meaningless and isn't t special at all but useful to figure out. Maybe what really matters is that you are an observer and bring meaning to this vast messy whatchamacallit by simply living.

[@helensotiriadis]

It's so clear when you explain it. I think I'll be coming back to this video often. The idea that (at least) the past always exists is the only way I've been able to cope with the loss of my loved ones.

[@johnbockelie3899]

It's a called a liner existence. We come from the past, as the future moves into the past. It would be neat to go back and fix things.

[@SupportTheLittleGuy]

But what good is that if we can’t revisit these events

[@tayjones8552]

I always wonder what happens to today when it becomes yesterday!

[@juliai3956]

If you can remember, they're not gone. That itself is proof enough. But the thing is, the past and future have never and will never exist, yet your loved ones have. They are not bound by space and time anymore, as we won't be when we pass. I recommend Rupert Spira or Bernardo Kastrup for further, more precise information. And I'm sorry for your loss. This won't fix the pain, but it might help you accept it.

[@pedroroggla8129]

@@SupportTheLittleGuy maybe we can! With drugs? Maybe one of this nerds can help us travel back in time, i could see my dead wife and have a good coffee with her... maybe the solution is just a shot to the head, but we have options at least

[@NeilBaileyF1]

I was with you all the way until 0:22…..I can now tell the future thanks to you though, because I am going to the pub in 15 minutes to drink heavily to try to make sense of all this.

[@astrumignis2030]

This Video is a Disaster!

[@messengeroftruth7306]

Have one for me..I would join you but my doctor says I can't mix alcohol with the 15 meds I'm taking..it might cause me to not worry or be happy..that's not allowed anymore..how sad

[@mikezooper]

The block universe idea has comforted me for years. All the dead people we know, are still doing things with us "now".

[@ashokkumar-se5sl]

REAL LADY SPEAKING OR AI ..

[@joelhubeny7554]

Yes as Energy or the Negative charged electrons but our human life span isn't a Mini Micro Blip coppered to all of all Existence. So it still nothing. Like the amount of Electromagnetive waves that Negitive Charge releases and we only see the visible light spark. it's absolutely Nothing to the whole

[@Flylikea]

It's "now", and the information of "now".

[@joelhubeny7554]

Now is just a Micro Nano Second moment moving through Space/time. it's gone before you can count it because Negative Energy is always moving towards the Positive.@@Flylikea

[@princeofallnegros4035]

Huh. U see dead people? 😮

[@mengel419]

Immediately after watching this, I watched a documentary about Kurt Vonnegut, the author of "Slaughterhouse Five" and numerous other excellent novels. If for some reason you are unfamiliar with this book, it is about a man who becomes "unstuck in time". I read it many years ago. And it is the perfect literary accompaniment to Sabine's lecture.

[@dixonmooremusic]

Heh! Timequakes!

[@danovantuyl7911]

Kilgore Trout - "ting a ling"

[@syndrome1965]

Read the book, and, saw the film, both several times. I love that story...

[@1220b]

I've been metal detecting for 35 years. Each time I find a roman coin or medieval buckle I'm always aware I'm the first to see this light since it was lost. A direct link between Two periods of time.

[@larrywright1589]

Time is⁸ nothing but a measurement, Ubuntu it has no matter, atoms, volume, mass. 6TH GRAVITY can slow down clock's or other mechanisms that measure time but it can not have a effect on time.

[@christian2i]

@@larrywright1589 'time is a measurement' and 'gravity slows down what the measuring devices measure' don't go well with 'gravity has no effect on time'

[@АндрейДенькевич]

When coin was laying underground , time was frozen. But when you find it, time for coin began go fastest, coin began moving. Conclusion: time is energy. i've been writing program's also for 35 year's. Each time i write line " if i found coin then BEGIN ... END" i know that time for part between BEGIN .. END is frozen but not between if and BEGIN. And when found, then energy of processor touch BEGIN and time go fast between BEGIN .. END. Surely in computer time is energy of processor.

[@larrywright1589]

@@АндрейДенькевич how long did the coin lie under ground???

[@АндрейДенькевич]

@@larrywright1589 time was frozen, therefore have not longitude . It's link between Two periods. Answer: 0s for coin. But for other's i don't know. Time is abstract meaning of energy. Time is called always time, but energy is usually called differently for different kinds of energy.

[@miken2968]

Here in 1976, and I'm praying the past exists

[@GlennInman]

Thanks!

[@anthonyw6488]

Just discovered Sabine. I love her dead pan humor and style. Being a student of Non Duality (Advaita Vedanta) I find her examples so strikingly similar to the consciousness only model that it helped me understand the notion of consciousness contracting itself via the observer to experience 3rd dimensional reality and how all there is is now and our experience of this now. Thanks

[@dharmendrasharma6070]

"Now" is a mysterious phenomenon, it is an infinitesimal small point in the time. Most of the time we are constantly moving from the past into the future and "now" is a very small connection between these two. how big is the "now"? is it a second? or millisecond, or a nanosecond or a .............? no end to it. the passed femtosecond at this moment has also become the part of "past" but our consciousness still perceives it as present. the "NOW" perceived by us is an illusion created by our limited perception, our conscious mind throws itself to a time span which includes the past and future, and perceives it as "now". it depends upon the limited speed of our neurons in the portion of our brain which senses the time as "NOW" and when a person can be in that moment of "Now" and flowing together with it, i think that is called as "Meditation".

[@anthonyw1499]

@@dharmendrasharma6070 there is no past and future. No one has ever experienced the past so it must be as illusion of sorts. The now is beyond space time and not a piece of it as you’ve stated

[@posmoo9790]

'humor'

[@dissonantchaos7724]

If there's no past how can we take a video or snapshot of it and keep it forever? If there's no future how do we progress with how we grow? How flowers grow/die? This is ridiculous to think these things don't exist

[@mayanktripathi8726]

@@dharmendrasharma6070 "now" may not have an upper limit but it sure Does have a lower one। It cannot be less than plank's time

[@imilly]

i need to go to bed.

[@jamesdenys9533]

😂

[@DMJ15-j8i]

😂😂😂

[@DogeUSA]

No, stay here. I need wake up in 3 hours.

[@sandeman2001]

Especially after 3:33

[@guacamolewindow448]

😂 Best comment on KZbin

[@shugyosha7924]

I’m not a scientist but I always felt the block universe made the most intuitive sense.

[@stevenlake5278]

Everything and nothing all exist at once. Therefore the past and future exist at once. Nothing has happened and everything has happened all at once.

[@movieonline4947]

@@stevenlake5278 WTF is that even mean, you're just confused. Don't worry, 1000 years from now, I am sure people will get a little bit more idea about it.

[@etc4xg]

It only makes sense until you start getting into the quantum weeds like GHZ state and such

[@shugyosha7924]

@ You mean it’s not compatible with a block universe?

[@tmst2199]

So why does Einstein arbitrarily call "now" the moment at which light hits the mirror? Isn't actually the instant the light emanates from the observer?

[@mike03a3]

My darling daughter asked me yesterday "How many stars that we can see don't exist?" She realized that some could have exploded into super novas long ago, but the news just hasn't reached us yet. (It's not always easy being her father.)

[@TheROZ]

i ve learned so much. ill never pronounce albert einstein the same again

[@rogda123]

Ahahahaha

[@nosessniff]

Einshtein

[@programroom689]

some germans pronounce chips as "ships" or Chinese as "shinese"

[@janaharvey550]

😂

[@Toreno2k]

@@programroom689 Einstein is a German name and she's pronouncing it correctly

[@bassdeff8819]

I just want to say thank you explaining all these concepts in a manner that even a blue collar joe like me can wrap their head around.

[@marmadukewinterbotham2599]

I've always had a strange feeling that the past is 'somewhere over there'.

[@JamesDevine]

“What the hell am I looking at??” “You’re looking at now, sir. Everything you’re seeing is happening now”

[@jamesjeffers1217]

One of the best parts of spaceballs

[@grumpsoldguy2769]

CLASSIC! Well done, Sir!

[@jimm9157]

"We're at now, now."

[@Iseeyou317]

Mel brooks lol

[@JulieMcNally]

Space Balls

[@thatsentertainment5602]

In a way the past does exist and we can re-live them in our memories whether they are good or bad moments. The past may not exist physically but it does mentally.

[@dennisgalvin2521]

Sort of like turning an egg into an omelette the complete egg doesn't physically exist anymore as it became an omelette but we can remember it as a complete egg.

[@Rockhoundingcolorado]

The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.

[@chuckh4077]

It does exist But in a different dimension

[@WoolyChewbakker]

There is clearly a misunderstanding here. Time itself does not exist, it is just something that we as humans have invented in our minds to satisfy theories that we have.

[@JC-yy8iv]

Such a cool coincidence that I found this video today! Just yesterday I was thinking to myself that the past is no more real than fantasy. Specifically I was thinking about my city, the version of it that existed 20 years ago, and how that place may exist in my mind and the minds of others, but so do Oz and Wonderland, and none of these is a place one can go. I’m glad to be challenged and informed on this at the same time!

[@charlessands6933]

I can understand how you would proceed if the past is fantasy but you can't take it too far because there's one key difference. That difference is things that happened in the past actually did happen and they have an influence on the present and since things that were done or bills or said in the past can still be a witness today that that means the past is never truly gone.

[@Mr.Robert1]

@@charlessands6933 The past played a big part in what's going on today and why.

[@studas2011]

Which city are you referring to?

[@benjaminroe311ify]

Ah. Yes... If only the past was really gone... but alas the past is now and the past is the future. It is all ONE. Peace my friend.

[@johnowens22]

The only caution I would add is...the past does, in fact, exist now for some place/time, but this is not necessarily compatible with saying that it exists in our minds. Our minds do not contain the past. They contain perceptions or conclusions only. They are mere interpretations and can be and likely are ALWAYS "wrong." Example: Newton was wrong when he came up with his equations and laws. He thought he was right. Many thought he was right. He was, indeed, possibly partially right, but he definitely was not correct. Nor is ANY perception that we have actually the "real" correct perception. It is both incomplete AND wrong, due to our lack of knowledge and our incorrect assumptions that some things are one way, when they aren't.

[@ChipsMcClive]

I agree. Time isn’t a factor of state change. It’s just a term that people use to try and comprehend the movement of matter. To do “time travel” you have to assemble matter into a state that you believe represents how it once was. The implication being that if you can do that, why not use the energy on something more valuable than regressing.

[@--legion]

Time isn't illusion. Time is motion, motion is time. To move from one state to another, which is existence, requires the motion of time. Without it there's nothing, which is timelessness. The perception of time is subjective, and it's this perception which is illusory.

[@monabear7287]

Time is either merely a measure of entropy or an arrangement of particles. Both can be true but both cannot be false.

[@fritzforsthoefel8031]

But if you merely assembled matter into what it once was that wouldn't change the present because that would be a separate action altogether but your statement is very well thought out

[@xxbigkisses]

i witnessed, in my own livingroom in march of 2021' at 5 a.m., an event(i would call it). i had already had plenty of sleep so i was laying in bed reading things on the laptop. there was an orange light reflection off of my opened bedroom door which is across from our livingroom window. at first i ignored it because i thought it was my daughters tail light reflection from her car, thinking she mustve gotten up extra early for work. a few moments past and the light was still reflecting and as i studied it, i noticed that it resembled how fire flows. of course its just light reflecting only because the window itself has a cheap plastic blind over it which we hardly ever open. next i realized i need to pee and i best not keep trying to hold it. so, i slowly sat up, reached over for my cane, slowly rose to my feet as not to get our 3 dogs awakened, and hobbled only 6' feet to my door and i first noticed the entire livingroom was dimly lit due to that orange light. then movement caught my eyes just to the right of that window and i witnessed a 4' foot long sparkling-like upside down cone shaped image that was in the middle of dissipating upwards into the ceiling. well, im no dummy! it looked exactly like the star trek old series where people get beamed up. i stood there in my doorway, frozen. i instinctively knew that if i got caught up in transference that i may get sucked in. as soon as it finished, our dogs instantly woke. i stepped into the room and hobbled to the next room to the window with the shade usually up but the orange light was gone. and it was totally dark outside. i couldnt stop there long because i had to pee badly. in the bathroom i heard my daughter in her own bathroom. back to my room i called her on my cellphone to be careful outside because i seen something and there was something in our driveway. the point is: travelers in time are helping themselves to peoples homes anytime they choose and thats not right! i always imagined there was a natural protection against that stuff, like GODS LAW. i was concerned about my granddaughter who sleeps in the room beside mine. so there are travelers

[@3kinformaticamanutencaoeve91]

@@--legion Heidegger? You see the "nothing"? You goes "there"? In a meta+fisical way? So this is really about "being"

[@jsmith1746]

So happy this came up in my feed. I have always been interested in math, physics, and engineering, but am nowhere near smart enough to have had any success studying it. So happy there are smart people who are able and willing to explain it to dummies like me!

[@11dsw]

If you’re interested in this, in any way, you’re not a dummy😀

[@leejohnston2003]

Don't put yourself down

[@victoriamassey9830]

Same

[@mimidec]

I was always too scared to pursue science for higher studies tbh. Most people are. None of us are dumb, since we're all humans lol. You just have low self esteem, you're not dumb ♡

[@usernameinsane3]

the dummies are those with no desire to learn at all. you’re smarter than most without even knowing

[@Bill-ge8bv]

I really enjoyed the video which is to come.

[@JoeR203]

Time keeps on slippin', slippin', slippin' into the future.

[@macywood4619]

Love that song!

[@lilblackduc7312]

Listen to 'Time' by Pink Floyd.

[@RagDraggo]

Yesss,, time does indeed keep ona slippin slippin slippin,,, into the FUTURE. That said,,, (and I sure hope everyone's sitting down before you read this) NEXT STOP,,, year 2045 !!! No bleeping bull,, we BLINK,, and it will be year 2045 !!!! What you figure YOUR life (or existence) will be like come year 2045 ???? The thing is,,, a certain percentage of us will already be DECEASED,, come year 2045. To those of us who are still alive come year 2045,,, hopefully our world will still be bearable,, and NOT all (well I'm not going to even go there)! But seriously,,, time is passing faster and faster and FASTer! Think about how we are just about halfway through year 2024,,, when New Years Day 2024 barely seems like just a month ago!

[@JoeR203]

@@RagDraggo You're right. Time is moving faster. I remember as a kid watching TV and commercials would come on every 15 minutes. Now, watching a show on SlingTV, commercials and ads show every 7 minutes. Funny though, when the ads are playing, time seems to slow down because it seems like it takes 8 minutes for them to finish.

[@TriGrutt]

Gotta love Steve Miller!

[@Theafterhourshow]

I truly enjoyed this, the dry humor, the information, and the speech. It’s very unique. I would gladly take a masters class with her as the teacher.

[@aogwaro]

I agree. Her jokes land so weirdly funny.

[@vhawk1951kl]

If you know any, ask a grownup to explain to you why nothing can be " *very* or nearly(as is occasionionally heard) unique" - see also *very* pregnant or *very* dead. I am a little puzzled that you appear unable to understand that, but seemingly you have no idea what unique means.

[@MrZorx]

@@vhawk1951klsomeone can be very pregnant, and something can be very unique. Something can’t be very dead though.

[@vhawk1951kl]

@@MrZorx Only an imbecile would say that

[@vhawk1951kl]

@@MrZorx Ask a grownup that speaks English to help you; pregnant and unique are absolute terms like on or off and dead -thus very unique and very pregnant are no more possible than very, on very off or very dead. Whoever says to you than an object is very or nearly unique is either an imbecile or an American, but then most Americans are imbeciles and I have never met one that can speak English similiter very or nearly or quite pregnant, and anyone that tells you otherwise simply cannot speak English and is a halfwit. You will occasionally hear 'very' pregnant when used to describe a woman that is obviously pregnant, but it is simply bad English. Unique means that there is *only* one which it either is or is not which is absolute, but you will hear the lower classes and those that are simply witless say nearly unique and that *because*they are witless members of the lower classes and do not understand what unique means, nor understand anything about absolute and relative terms.

[@littlerayofsunshine69]

So, same principle could apply to sound. Someone firing a gun would hear it the moment they pulled the trigger (that observer's "now"). Another person several miles away would hear the same gunshot a few seconds later. The gunshot is in the past, but actually, that event only exists then for that observer.

[@maxsteinhausen2197]

Yes and exactly the same is true for light. But, contrary to Sabine’s theory, I can’t see how that would mean that a past event still exists, rather, I think that the emitted sound, light, radio waves travel through space eternally and can be observed by whoever is at the right place at the right time. So I don’t think we can travel time, but we could possibly fly away from earth at the speed of light and then receive the world’s TV and radio program from the 70ies.

[@kongyiu]

Yes, but how about if the sound is blocked somewhere between the source and the person who could hear it? For that person, there was no gun firing. Same if the the light of a star somehow can’t reach us because it’s being blocked. For us, that star simply doesn’t exist. So the whole thing about time is the light that travels from the source to you, but if there is no light to see, then you can’t see the past and it just don’t exist anymore.

[@bruzote]

@@maxsteinhausen2197 - How can you travel at the speed of light in order to catch up with TV and radio signals traveling at the same speed of light? You would never catch those signals. So, you would have to settle on sitting in one place and waiting for broadcasts of reruns to reach you.

[@NothingToPointOut24]

The past is just a reminder that at one point we were the all in the best place in our life that we’ll ever be. Very rarely do things get better with age when it comes to being a human. Your body breaks down, your mind breaks down, you lose friends, you lose family. Eventually you hit a place and time where things reach their maximum level. And from there the decline starts. What percent of the population could say the final 30-40 years of their life were better than the first 30-40? I would imagine not many. Midlife crisis’ happen because we know the past is gone.

[@TylerSmith-sd2oc]

Every moment exists as its own point time passing over like a film layer giving us the illusion of life

[@GP-yc2it]

except there's no film to review.

[@kushkushbabyy]

@@GP-yc2it different dimension

[@TylerSmith-sd2oc]

@@GP-yc2it its not about the review. Its about the experience.

[@kevinrice7635]

Yeah what he said 👏

[@cesaravegah3787]

Is kind of humbling that things like time or gravity we are only begining to undestand how those concepts work but have absolutely no idea about why work and what creates it.

[@badass.bob1]

Being humble is true freedom

[@columkenn]

Speak for yourself when you say 'we" don't understand what creates the laws of nature.

[@parinyachintanakarn4953]

The strange things about getting old is that the intimate identification of here and now are slowly lost.One feels transposed into infinity more or less are alone.No longer in hope or fear, only observing.

[@KevinKevin-p8z]

Tha past exists but in what form is the question.Go back in time faster than sound or light and you can recieved the first radio signal , watch the first tv shown.

[@rb032682]

Whether it still physically exists, or not, much of my past will haunt me forever. But I try to stay positive. 😎

[@rb032682]

Cannabis tincture helps when dealing with my past.

[@alexbauman4203]

Word

[@petey611]

​@@rb032682 ya just get high, that's the answer 🙄

[@joshdean5867]

Gay

[@vf12497439]

I feel your comment. I for one hope the timeline runs out without being recorded so that once I pass my existence and all I’ve done disappears with me. It’s not that I don’t have a good life and enjoy my life. I’ve made mistakes that bring shame. But I’m 51 and I’m getting tired. I don’t want to be an old soul. A long rest without being revisited is what I want.

[@tonycole3532]

Its 3.00am and I couldn't sleep. Just watched this video and at long last I understand Einsteins Relativity theory. It's like a mist had cleared. After decades of uncertainty over it you have now explained it! Thank you so much!!!

[@Mr.Robert1]

That will be $1.00 Now what that bill is worth is relative to the year you give it out.

[@michaellongstreet4876]

It's exactly 3:38 for me, theoretically, me and you have experienced something in our lives that contributed to the experience just a few minutes a part we just went through, how interesting

[@jppcasey]

Sabine has a PhD in comedy. Her delivery is simply perfect to the point where you have to pause the video and ask yourself: Did she really just say that? Lol. She's hysterical. I absolutely adore her.

[@SticklsOfDoom]

"In time, we can only go forward. There's no way to make a u-turn, and there are no driveways for awkward three-point turns, either." I did, indeed, have to pause the video and ask myself if she really just said that - and then keep the video paused as I cackled for a few minutes

[@mohammedalam1361]

She is a savage

[@wtmvm]

Simp crawler lol...

[@engineeringvision9507]

I love how she trolls her own audience 😂. It's brave 😊. I'm waiting for the pro-Brexit video, that should really set the comment section off with the self identifying Lib Dem intellectuals ;-)

[@CAThompson]

@@engineeringvision9507 She's not an actual troll...

[@ronaldbeerguy]

Does this have anything to do with the space time continuum?

[@julialucas1482]

The past is impacting me as much today as it did the moment it first happened. When people say that someone should forget the past, they are not aware of the impact the past has had on the individual in question. We should have individual sovereignty because we are each, in and of ourselves, an individual cosmos that is still learning about how to take responsibility for the planet and its inhabitants.

[@SitarJourney]

That's not true. You're not the same individual as you were in some point in the past. You have more entropy now and you cannot undo it.

[@tingtang9302]

It is true. Simply redraw the conception of your individuality with some interesting axes, and voila! Oh and also be born into a certain tribe who controls publication lol

[@ernestbean2998]

It's our past that makes us

[@bigcityjunglecatenvisageth1422]

@@ernestbean2998: True!

[@bigcityjunglecatenvisageth1422]

Julia: I am exactly the same on that theme. It is as though you are describing me. I am very much a product of my past.

[@Justhings332]

When I think about the past. Technically the speed of a human thought is roughly as fast as the speed of light. (Neurons firing sparking a chemical reaction producing the thought) Therefore it is possible to subconsciously travel back In time because the speed of your thought got to the past, in “no time”

[@jamesbennett9406]

"Reality is merely an illusion, albeit a very persistent one." ~ Albert Einstein

[@scottcody3026]

Time is in levels. Like many clocks ticking but in different dimensions. Hence the past and future exist but we are currently unable to skip into other time levels / dimensions.

[@myriaddsystems]

I like the down to earth explanations. The greatest indicator of intelligence is shown by someone who can explain advanced ideas in such a way that anyone else can understand. Superb!

[@Rockhoundingcolorado]

The fact that time exists, no matter where you go in the cosmos, you can't outrun time. You can't not exist without it, or you won't exist to know that? Its all important, and may be the actual being, we call GOD. It witnesses everything at once. Isn't that God? Its every where at once.

[@pttimothys]

@@Rockhoundingcolorado Maybe there is no GOD. we would found life outside our solar system soon. you cant prove GOD exist , but you can prove science exist.

[@Rockhoundingcolorado]

@@pttimothys life is a virus, and life evolves. Just like a virus. So where it exists, there is no stopping it. That could be why we are at the outer edge of the cosmos, instead of at its heart?

[@Rockhoundingcolorado]

@@pttimothys Well by god, I mean creator. I don't think it has any power beyond our own. Thats why it can't enter act directly with its creation, and we, if its true that we are a creation. Then the same elements that we are subject to. So it would be like gravity, heat ,cold, If time is this all seeing all being. Then it is constrained by the same elements we are. Except time, which it can access like a computer. It may even relive the events in its minds eye at will.

[@Rockhoundingcolorado]

@@pttimothys What WEBB is telling us, and showing us. Looks like a giant neural network. Perhaps it is? If something would have created life, they would have hacked that to do it.

[@eugenedegeorge5084]

Time and space has always fascinated me. I remember in college being told that the light from the stars we see now left thousands of years ago .so I thought, well, suppose the world ended at the furthest edge of the universe. we wouldn't know that for millions of years, so maybe the world has already ended, but we don't know about it because that time and space haven't reached us yet. Any thoughts on this?

[@cmunoz810]

I think you mean the universe ended. If the world would end we would know immediately since we are in it.

[@eugenedegeorge5084]

@@cmunoz810 I kind of used those 2 words interchangeably

[@winstonknowitall4181]

That's exactly what it means. Search for videos about the "vacuum decay". It is possible that the universe is only in a semistable state. If it is true, at any moment at any place it may switch to the true stable state. However, that would mean all matter is destroyed, because some basic properties of physics would change. And this effect would propagate itself through space like falling domino blocks at the speed of light. So, it is possible that it already happened somewhere. And this "wave" of termination races towards us at the speed of light. And there is no way to detect it, before it arrives and everything (in our fragment of spacetime) ceases to exist.

[@InvestigadorTJ]

Same application in the subject of Jesus existence and that light a reference point.

[@piccadelly9360]

The time ( past ) is stored in the light . but we will never be able to see the past only aliens who are far away from us can see our past , but they will never be able to see our presence .

[@kennethmalafy503]

I loved your explaination but I still do not believe that the past exists somewhere in a physical sense. That would mean that the enitirety of the past existence (even before humans and maybe even before the universe) of everything, would exist somewhere in a sort of "cold storage," I guess. Like that old SD drive you will never access but are still saving in your basement. That would also open the possibility of traveling to the past, since it exists somewhere in the physical dimension. There is absolutely no evidence of that to be found anywhere. I think time is a trick of our perception. That why it appears to move at different speeds at different times and even seems to "stand still" occasionally. It exists in the same way an inch exists- a unit of measurement. I guess I am part of the "now" crowd. I think "now" is all that exists. All that has ever been and all that will ever be. It never began and will never end but it will constanty keep changing. Which is why we need time- time is a measurement of the change in the universe. There is no past or furture, except in our minds (perception). I have yet to find something that contradicts this and most evidence I find points to this. Looking forward to reading your book and might check out that site. Be well.

[@abrahammulder]

Yes, agree. Time is a human invention. It does not exist I dont understand why so many People have this funny idea about this. In the universe only space, matter and energy exists. The movement we observe has nothing to do with a time progress!

[@unkle_Enkil]

Think of an old music cassette (tape). You listen to one track then move on to the next track, that previous track stilll exists, but only in the past. If you view time in the same manner its easier to get your head around. Whilst listening to your current track, a future track exists but the listener has yet to reach that point. Past ,present, and future tracks all exist simultaneously together.

[@owljones3389]

@@unkle_Enkil That would be a valid argument if someone was out there storing time on a giant boom box - but no one is. So.....

[@taragnor]

Yeah basically there's no reason to believe that the past still "exists." It's essentially just a prior state before the current state (which is now). While you can mathematically describe the past, and the same physical laws still apply, the past doesn't physically exist somewhere. And while observers can disagree on when now is, the important thing is that they're not actually changing your past, they're just getting information about it differently.

[@unkle_Enkil]

@@owljones3389 how do you know ? .. maybe father time is into the music of the spheres, after all people believe in a god, good, evil, luck, karma etc...we all believe in time, our lives are structured around this concept, but who's to say it exists at all. Maybe we're all deluded. Or maybe it's just me.😄. Don't you just hate emojis.

[@bustercrabbe8447]

Ask any Historian (not a philosopher or physicist) if the past still exists. Yes, in existing documents and records and Chronicles.

[@harry2928]

Dear Mrs. Hossenfelder, Thank you for your work and efforts in the service of educating the public while making the concepts accessible to a large audience.

[@silversurfer2703]

Not large enough 😂

[@Jesus.is.the.Way.2386]

would she get 800 000 views in a loosely fitted floor length frock - nah; she's even asking for donations; note all followers are men

[@freyabookishgamer]

* Dr Hossenfelder

[@Juice-chan]

Even though I watched a lot of science videos it is the first time I heard about the block universe. Well explained. And now I am mindblown.

[@donaldstrachan7377]

In my humble opinion now is always local. An example: A star explodes a million years ago and I see the nova "now". I can measure the red shift and understand that the explosion took place a million years ago (not " now") and it took that same million years for that information to arrive at my location. Other observers at different distances from the star will receive that information at a time they may call " now" which will be different from what I called "now" as we are in different locations. Comments?

[@WeWillAlwaysHaveVALIS]

Surely you are just on about frames of reference there

[@jipangoo]

Opinions are like assholes... Everyone has one

[@user-qj5sc5oy7f]

And what? It doesn't prove the past still exist...

[@BuleriaChk]

All numbers are positive. - c = a - b. b >a iff b-c = a, a + 0 = a . a - a = 0 iff a = a If there are no negative numbers, there are no square roots of negative numbers. 1. You can travel inthe pas only if t is imaginary. 2. You can't even do that Substitute t = a (even making t imaginary won't work: (it)^4 = t^4 > 0 ????) Much more to this but I don't have the spacetime to write it here. "Yesterday, upon the stair I saw a man who wasn't there He wasn't there again today Oh, how I wish he'd go away", - Ogden Nash

[@rickkearn7100]

Aside from the similarity between the breakfast I was eating as I watched this and what my brain felt like at the end of it (scrambled eggs), I was truly enlightened, as always, and thankful that Sabine has created this YT channel.

[@kvdp9543]

My chemistry professor called theoretical physicists "those theologists in the other building". I totally agree. Science begins and ends with observation, not with theory.

[@peacesound1101]

@@kvdp9543 you're utilitarian to the point of ignorance

[@FF2Guy]

I’m not sure if you mean that you were eating scrambled eggs for breakfast or if your brain felt like scrambled eggs after you ate breakfast.

[@vauchomarx6733]

@@FF2Guy Both, probably.

[@kvdp9543]

@Javi Oz Why is that different to religion?

[@jakubkrcma]

There is a huge difference between something actually happening and an observer perceiving it. All observers perceive nonsense that isn't there anymore. Just distorted footprints of the past.

[@violenceisfun991]

come off it barney we all know you went to tennis camp last summer

[@csaracho2009]

Nonsense.

[@ASLUHLUHC3]

With this question, I think many would think of 'present' in terms of the conscious experience of 'now' rather than in terms of where physical stuff might be.

[@dreamerworld1495]

Dont eat for few days and hunger will proof to you present is real.

[@CAThompson]

I think it's both. It's also what state we and the rest of stuff are in, after events of the past have occurred. In the future what's happening now will leave its mark too.

[@noThankyou-g5c]

i dont see what that changes really. Wether you pick the “now” where you’re thinking a certain thought or experiencing a certain sensation OR you pick the “now” where some things happen to be in a certain place, all the rules are still the same. It’s still possible that some observer in the universe can observe you thinking about my comment and see it as happening at the exact same time as a supernova that happened millions of years in the “past” from your point of view.

[@pauldzim]

The conscious experience of 'now' is the result of physical processes in your brain, so they are really the same thing

[@onetwothree4148]

Nobody believes the light we see from distant supernova explosions came from an explosion now. We all intuitively use "now" to refer to the local time of the event occurring. We see it now, it happened years before. The fact that we can't definitively know now, because everything happens outside the now of our delayed brain's local time, while as uncomfortable as any other conclusion of skepticism, is not a rational reason to believe other counterfactual theories that would allow us to believe we have real knowledge.

[@ScottIchniowski1989]

Not now that the internet and digital world exist it changes everything. We can go back and interact with something we did yesterday , alter it , continue or discontinue a conversation , interact. W it differently to determine our future. For instance if I leave This comment and never come back to it my relationship in this timeline of events it’s over ….but if I ask this nerdy strange lady out on a date and she dms me yes , then I enter a new timeline that didn’t exist until she DM’d me . Hopefully she won’t break my heart or I’ll be stealing her Time Machine

[@duncanfisher2986]

Richard Rohr says that if things we derive in systematic theology are true, then we should be seeing them in science too. I've watched this marvellous video several times, and I can think of about five. Excellent!

[@lbj4993]

Not true, it was Richard Pryor 😂 and he knew what he was talking about...😮😂😅

[@RoflMyWafflesAndySB]

What five did you come up with?

[@Daniel-Strain]

The problem with systematic theology is that, no matter how 'systematic' you get with it (and how many Latin or ancient Greek based scientific-sounding terms you create within it), it is still ultimately based on source material of dubious origin or reliability. It is exactly the same as a 'systematic' approach to studying Moby Dick or Harry Potter. For example, in systematic theology there is a category called "Pneumatology" which is the study of the Holy Spirit. I could make up a fancy word for 'the study of the ghost of Christmas past' and use Dickens' "A Christmas Carol" as my authoritative source. None of it would have any obligation to align with reality in any way, though I could make it, with enough imagination.

[@lbj4993]

@@Daniel-Strain Exactly, in other words, if you can convolute a subject, any subject, enough to where 98% of the general population feel it's beyond their capabilities to understand, you can't get away with anything. I can deal with Moby Dick, mainly because it has the word 'Dick' in the title, and I know for sure it's pure fiction, but try to explain to people that theology is a bit of fiction as well, good luck with that...🥴🤣

[@cryptotradersbitcoin8183]

Only the result from the past exists. You can give it new attention or replay it with your bio computer, even change it from there but you will never have changed the real event when it occurred. You can still change your point of view or decide if the event is still of value to you.

[@Anurag_LKO]

Future can be changed...

[@sergifernandezmiranda1311]

I have watched many videos about physics trying to understand all this. Without doubt, this one is the best explanation in simple terms that I have come across

[@glyndaley5844]

Watch DR WHO lol 😆

[@tricisport8259]

Better look forward.

[@TheTorontonian416]

In simplest terms, imagine the smallest unit of time is one second. Each second is a page in a flip book. As you move through each page of the book (one-second per page), you leave a part of yourself behind, thus leaving the past behind you. Theoretically, the past still does exist. Imagine each book page shrinking to the smallest unit to the point where it's almost invisible. That's what we perceive as time.

[@MoonjumperReviews]

Interesting. I don’t have the mathematical/physics knowledge that you do, Sabine, but I understand the gist of what you’re saying: Essentially that what we perceive as “now” is actually delayed by some tiny micro-fraction of a second from the moment that it actually occurred. That makes perfect sense to me. What I actually thought you were going to discuss (or you did, and I didn’t get it, LOL!) was whether or not what happened in the past still exists in the past: in other words, could one travel back to the past and witness what happened, watching it, even physically touching it in real time? We can already watch it to a degree: Photographs exist. Film and video exist. That’s almost like a form of time travel in that it captures a moment in time that we can perceive with our passive senses (sight, sound). But could we go back and touch it, interact with it? Does it still exist on some dimensional plane that is tangible? Is someone who passed away years ago still alive in the past? Could a time traveler speak with him and be understood by him?

[@cherrybomb2600]

That's why I started watching, for that information. Thanks for saving my precious time!!!

[@periwinklecarruthers6470]

I wanted to know does the past, present and future operate simultaneously with each other and are they all equally valid - or have we only the present? If the past exists, then are we always going to be alive somewhere?

[@MoonjumperReviews]

@@periwinklecarruthers6470 - I think that’s likely - or it’s only my time travel sci-fi fantasy - but I’d like to think it’s true!

[@retrofuturism]

Reality is a feedback loop. kzbin.info/www/bejne/nnLHfZhuaZakj9k

[@richardday3136]

Something like this: Time might be somewhat though not exactly reversable within small isolated systems and ~great effort~, which we may be able to externally observe. In replaying that timeline we could plant a clue in the form of another isolated sub-system which they could read and then alter their behavior. They could communicate back only by dissipating energy out of their system into ours, which we would have to replenish and then some to keep their timeline growing. I suspect it quickly devolves into any number of clues and timelines where whatever you were looking for ceases to have much meaning. And when you start seeing all the clues before you even start the experiment it becomes rather ghoulish.

[@nihal114]

I will have to watch this multiple times to understand my own example of this to confirm that this video is correct. I love this type of content.

[@nicolasdelaforge7420]

to 114: all it means is that when something happens (the "now"), it takes time before you see it. Because it depends on the light reaching your eyes, which takes time. So, you are late seeing it. Therefore, when you do finally see it, the event or some thing may not even be there any longer. Or it's in the next "now" that you don't yet see. So we are always already in the past. This is more obvious at long distances. For beings living on a planet a biilion light years away from us, Brahms 1st Symphony has not yet been composed or heard. It's still in their future! They will hear it in some millions of years. They will observe it then. If they're as smart as Sabine, they will know that Brahms' 1st was written long ago, by those called "humans". But it's not true in this sense: they may well see my grand- parents in some millions of years but my grand- parents are no longer living their organic life, and not being conscious. The distant inhabitants will not be able to insert themselves into their lives.

[@SarkaBlahnik]

@@nicolasdelaforge7420 This is not correct. The observational delay you are focusing on - due to the fact it takes time for light to travel some distance - can be realized while still falsely thinking time is absolute. It is essentially no different than the fact in everyday Newtonian physics that it takes any object moving at any finite velocity some finite time to move a finite distance. Special relativity says more - that time itself is a frame-dependent coordinate. Time is not absolute. Two observers in relative motion may agree that a photon from a distant star must have actually been emitted sometime in the past, but they will not agree on *how long ago* in the past it happened. In fact, the first observer will not agree with the second observer even on what the spatial distance is between the star and the first observer - spatial lengths are also different in relatively moving frames. (You might have heard of this referred to elsewhere as "length contraction".) This allows for a new notion of "distance in spacetime", usually called the spacetime interval, to exist when all four coordinates are combined in a special way. This the two observers *do* agree on, though they disagree on times and spatial-only lengths considered separately. Though Sabine didn't have time for that in this video, it comes out of the same mathematics that forces time to be frame-dependent.

[@foureyedchick]

As a person who suffered personal tragedy and loss of loved ones I would love to embrace the philosophy of the title of Sabine's video: "Does the past still exist?" However, as an engineer and mathematician and scienrist, I have to clearly see reality of the absurdity of my thinking, and realize that it is impossible to go into the past. You can relive past events in your menory, but you can't go into the past and actually be there. Time is a dimension, and we should treat it that way.

[@r_r_r_r]

If it’s any consolation-from a psychological and neuroscience perspective, we can go into the past! In fact we literally slightly alter memories each time we revisit them, so the past never “stays put” in the way we think, and with professional support, we can even revisit in all kinds of surprising and interactive ways. ❤

[@monabear7287]

Technically, merely exceeding light speed automatically takes you back in time...

[@foureyedchick]

@@monabear7287 This reminds me of that U-shaped 3D image where a plane is bent into a U, and the 2 planes are connected with a "vortex". If a 2-dimensional shape can be bent in 3 dimensions, why not "connect" 2 parts of 3D space in the 4th dimension?

[@lamia.thira.lowenstein]

the past didnt go anywhere

[@vgamedude9811]

Its quite possible i just am missing something but to me this seems more like a thought exercise than a reality. Existance is more than just observing light. Even if our past exists to a theoretical observer far away because the light takes a long time to reach them what does this actually matter? Interactions and existance are more than just observing light. I dont quite understand this.

[@StHubert1er]

It doesn't matter

[@BT-ir5zl]

I didn't watch yet, but my theory has been that time, or at least the image of time, exists in infinity. A simple example is that when we look at any heavenly body, we're not seeing it in real time, we're viewing the past. Thus, every act you've ever committed is still rocketing across space at light speed.

[@pipins3616]

Everything you look at happened in the past

[@jordanwhisson5407]

Yeah but it is simply old light and the objects are not where the were when that light was originally emitted

[@IWITNESS7]

If time was "infinite" we would never end up here in the present

[@KennethDonnellyStargazer21]

@@jordanwhisson5407 they are for the viewer 😎

[@scootermom1791]

That makes a lot of sense!

[@ralphjesperson]

My favorite example of this is the "Andromeda differential." On the day where the galaxy rises right after dark and then sets at dawn, there is a great difference in time between the galaxy observed on the opposite sides of the earth. At first this seams impossible, yet the math works out. The observers are not seeing the same day/time of that galaxy.

[@Panzer_the_Merganser]

@Wagner Strap on your Van Allen Belt and follow me. To the Oort Cloud!

[@MaryAnnNytowl]

Seams?? Um... might want to check your homonyms again, there.

[@MaryAnnNytowl]

@@Panzer_the_Merganser will I need an umbrella? Or just my towel?

[@justin.booth.]

Where can I read more about this? I can't seem to find any info but I want to know more, it's really cool!

[@felixmoore6781]

@@MaryAnnNytowl But what if they're in fact homophones? Should perhaps you check your semantics?

[@Atawak-n9u]

She is definitely on point about something. The nervous system functions just behind right now, because all electrical circuits more than less have resistance, ohms, and that ohm rating slows the processing capabilities of any connected processor. You will never in you're life experience right now

[@jaygreer7430]

Interestingly, neuroscientists have shown that the human brain is constantly anticipating the future, making predictions based on past and present experiences. As an example, catching a ball requires us to anticipate where the ball will be and where we need to be in the near-future to catch it. Driving a car or any other physical task or experience is similar. In a way, we’re always operating in the future or at least with our prediction of the future in mind.

[@jameswest9897]

Resistance in a circuit limits the flow of current, electrons however, still move at the speed of light and resistance doesn't slow processing time down. Processing time is controlled by your computer crystal clocking oscillator, but excessive resistance could make the device inoperable if current is limited beyond the minimal functioning current threshold of internal processing components.

[@Whatisti]

Ma’am, I have a question for you If somehow somebody doesn’t get out the Time Machine And go to the future And then go back to the past and then go to the present What does happened with his body? Of machine that happening to do

[@vinnymarchegiano]

The past existed once as now...This topic is too mind bending, and perplexing for someone like myself to comprehend. Great video 👏 You are a brilliant woman 🙏

[@williambowling8211]

Excellent treatment of that point in "Spaceballs".

[@vinnymarchegiano]

@@williambowling8211 Great minds think alike. Now? When? Just now!! But that's then?

[@LegendLength]

It's similar to calculus where you integrate each slice of a graph. With time each slice is a moment. When you 'integrate' them all together you get regular time.

[@datman3416]

In a sense yes. If a alien world was 100 billion miles away from us but had a telescope that they could see earth. Hypothetically they could still be looking at dinosaurs on Earth or even the primordial soup of lava and volcanoes idk

[@Stonehorn]

That’s not accurate. They are seeing light 100m years old, but nothing about that means it still exists, just that the light that existed at that time.

[@datman3416]

@@Stonehorn that’s why I prefaced my comment with “in a sense yes”, I’m not sure what you’re saying isn’t accurate

[@Stonehorn]

@@datman3416 fair enough, valid point

[@csaracho2009]

Exactly, ydk.

[@josephschwartz2180]

Sabine, you are one of my intellectual heros. What we consider the present is perceived recent past. This is why is is so difficult to truly be in the moment. Our brains are always in catch-up mode.

[@kevinerose]

Wait. Can you say that again? I didn't quite catch that?

[@Franciscasieri]

The older you get the closer our brain is to actually catch ing up

[@realdoomsdaybeast]

We may not be able to travel to the past but eventually we'll be able to revive it with AI, neuralink, and VR. Movies, music, even YT are really good time capsules. The Ai will be able to recreate past histories by analyzing all data available from that time. It's incredible to think movies in a 1000 years from now, will be data, to recreate life now and people then will be living in our time now.

[@BassHeartRiffs]

That's why some people believe we're living in a simulation.

[@henrycardona2940]

I know this might get glossed over, but I think it is interesting to think about what constitutes an observer. I think biological observers are scaled up, and the potential for an observer can be found as far below as a subparticle. For something to interact with universe (collision or force) besides the mass that would allow it to do so, the position it holds also counts. Having each particle observe allows each particle to interact whether it contains mass/force or not. Observing a particle would collapse its wave function, however a particle does not need to observe itself unless it was observing something relative to it like hearing involves not just the position of the sound but also the observer. It seems weird to imagine a particle could "hear", however it would explain hearing itself if we were able to scale down a system to the size of a particle. In other words, nanosensors right? I feel like it has already been done, and I am just dense.

[@kyelsavage6296]

Perception is key. Maybe everything is happening simultaneously but we can only perceive in a linear fashion.😊

[@helafed]

Do you have any literature about this theory? genuinely interested

[@kyelsavage6296]

@@helafed I had read this years ago but I don't have the source material anymore. :(

[@alpha-omega2362]

@@kyelsavage6296 or maybe you just perceive that you had read this and it was really your own intuitive senses.....

[@alpha-omega2362]

so, it's almost like your saying everything is in some ethereal form all scrambled up and we can not in our primitive minds perceive it and thus is must be laid out flat (so to speak) in linear form....with one thing happening after another but in actuality it could be happening parallel ...geez,,, I'm getting a headache......

[@ab1858]

If NOW some alien, on some planet a million light years away, fired a signal, did that event happen NOW or when the signal is perceived by earthlings?

[@gazzaaussie1000]

Summed up much easily ‘Time passes because we age’ Thank you!

[@Albo-bot]

Every seemingly random event, decision, impulse in your entire life has slowly edged you to the moment you clicked on this video. And now, here you are. Leave Sabine a damn like

[@nelsonclub7722]

This was posted about a year ago and its still here. So yes.

[@southphillylilly]

But it's not the past can't hurry yet it exists somewhere in between the future and the present. The past is not even past.

[@bestofluckusa]

It IS very interesting but it still doesn't make me irresistible to females.

[@boutayebbadaoui9665]

I followed your Quantum Mechanics course in Brilliant, it was truly a gem :)

[@mirrorspeak]

If it’s a block universe and the past exists, where am I in the timeline? The leading edge? Somewhere in the middle? It makes me feel sad that there’s another me going through what I went through and that I can’t change it for the better.

[@CB_4]

This is sounds like the movie Tenet watch it

[@seph13x]

If there are infinite timelines as has commonly been proposed in quite a few credible scientific theories, then couldn't you always be at a crossroads of chosing which timelines future you're going into based on your actions and free will? So it's more like a choose my own adventure book then a single version book with only one possible path/ending.

[@mirrorspeak]

@@seph13x that’s assuming you would have a choice…

[@schakiarligonde1736]

Well quantum mechanics may be in deterministic and if so you would have a chance

[@bruzote]

@@seph13x - There has never been a credible *theory* that multiple timelines exist. People seem to think that fantasies about unpredictable quantum events are substantive evidence of "theories" of multiple timelines or universes. There is no evidence that quantum events are not predetermined, despite the pseudo-random probabilities measure from their outcomes. As for free will, you really jumped the shark. You presume free will is not causal. If free will is not causal, it is random and thus not will. If it is causal, it is not free. Which one do you pick? Free will is an illusion because it is really a random outcome or free will is an illusion because it is really an outcome of the causal evolution of the mind's inner state?

[@nate666]

I remember when I was a kid in the 80s and 90s I thought it would forever be that time period and I would always be a kid. I didn't think I could be an adult. 😂😂😂