Spacetime, Premonitions, & Brachistochrone Problem with Neil deGrasse Tyson & Charles Liu

[@StarTalk]

Star Trek fans, what's your favorite prediction of the future that came true?

[@sandyago4735]

That the original crew would get old and fat

[@Studywzrd]

i still don't know why did you not upload video on Chandrayan 3 ❤❤

[@NAFOSergee]

That ruzzia would FA and FO

[@lymanmj]

That superstitious indereducated folk would leverage their collective elective ignorance to attempt a takeover of our democracy.

[@totalpr0st]

cannabis is legal in Germany

[@diegofernandez4789]

When Charles Liu is present, the high quality of the show is guaranteed. Great episode!

[@swis]

His answer for the dream about the punch in the face on the soccer field was so respectful and interesting.

[@michaelccopelandsr7120]

Neil and Chuck for 2024!

[@KC-nd7nt]

Yeah .... Naaaaaa

[@dbz_feats7723]

@@KC-nd7ntno one asked you

[@rolandorzabal1955]

Yeeeeeessssssssss

[@manishdewani233]

no brain can be normal in politics, do you wanna lose him?

[@loccc88]

Dude you post this in almost every video.

[@frogz]

ANY EPISODE WITH THE GEEK IN CHIEF IS A GOOD EPISODE!!!!!!

[@serarokkit]

Thank you Neil and Chuck for making learning an enjoyable experience 😊

[@JBG-AjaxzeMedia]

love it when Neil is also learning, just shows that there's always more to know, knowledge is infinite!

[@DanLee-du3kg]

This episode was so cool! I'm always impressed with the returning champ, Charles Liu. I'm amazed at his compassion, his calm cool and collected demeanor and sharp as a tack brain. Same for Neil. And Chuck Nice came up with some awesome questions in this episode.

[@KramerEspinoza]

Wonderful guest.Warm voice and extremely knowledgable. I really enjoyed it.

[@ZeroOskul]

I am so grateful that Charles Liu gives us the distinction between geek and nerd. Geeks know cool stuff and are obsessed with the weird. Nerds know all kinds of boring stuff that might save the world and are obsessed with knowing boring stuff that might save the world.

[@rbee6507]

This is...possibly my favorite episode, just in the first 10 minutes! Pretty good understanding of time and how we interact with it already, but thinking of it as Dr. Liu outlined just put it in a whole new "light". Truly is the final frontier of understanding our universe if we grasp that dynamic. Absolutely thought provoking in the highest order. And so many other points. I have so many questions to submit!

[@VikasDAce]

The best quote from Neil De Grasse Tyson is - "We do not know" and that is something that keeps the light burning 💥

[@racoonchief]

Okay but what does it have to do with this video?

[@VikasDAce]

@@racoonchief not much but related to the overall picture.

[@yos025]

Startalk is great but when geek n chief Liuniverse is in. Is about to get awesome and deep. Keep bringing him in!!

[@phillipwayne7516]

Come for the knowledge, stay for Chuck!

[@MichaelSmith420fu]

The Chuck never fails to make us smile

[@EternalLife42]

Yes he's going to get my food?

[@patriciabarr2161]

This was one of the funnest StarTalk Special Editions I've watched thus far. Loved it! ❤

[@SL-vs7fs]

Chuck is always killing it with his jokes. From the deep to the superficial. 😂 👏

[@jmanj3917]

...Usually... 🤣

[@farrukhbaig6198]

Same thing happened to me. Was too excited to play my first college soccer match. Only slept for 2 hours and saw the ground, it was raining and my team was getting ready. Next day bam. Was standing at the exact same spot, it was raining and my team was getting ready. Never saw that ground before in my life. I think it is string theory where our mind is somehow capable to jump a few frames and jump back.

[@isatousarr7044]

The interplay between spacetime and the concept of premonitions raises intriguing questions about the nature of causality and time itself. The brachistochrone problem, which identifies the curve of fastest descent between two points, serves as a fascinating analogy in this context. If we consider the trajectory of particles in a curved spacetime, could the solutions to such optimization problems reveal deeper insights into the fabric of reality and our perception of time? How might our understanding of these principles alter our approach to predicting future events in the cosmos?

[@clueless4085]

36:25 The brachistochrone problem was posed by Bernouilli in the 17th century. In case anyone wondered.

[@clbcl5]

I believe it was Steven Wright who asked....If your traveling in a space ship at the speed of light and you turn the head lights on, what happens?

[@kimjohnson4278]

Neil covered that on StarTalk. Relativity. The light shines in front of you just like if you were standing still.

[@EmpyreanLightASMR]

@@kimjohnson4278 I don't know know if that's 100% accurate though. Not a physicist, but Wright's question and your reply make sense up to and including 99.999999...% the speed of light. I think the actual speed of light would be asymptotic (just using the word to mean unreachable) because if you DID reach the speed of light, your mass would essentially increase to infinity and there'd be no headlight to emit light anyway!

[@skywatcherextraordinaire7014]

Great question i think they wouldve already turned on, in the exact moment that you reached 100% the speed of light if you intended on turning them on because; Time slows down when you travel faster and faster but time doesnt exist at 100% the speed of light, so for photons, so if you were going to turn them on they would automatically know and already be on and if you werent they never would be and their is no having them off and then turning them on at the speed of light because the information is exchanged instantaneously just like entangled particles in quantum physics thats my theory.

[@chefboimacog5176]

Mr. Nices premonition example is a biiiiig mind blower.

[@andrewforbes1433]

It's a terrific example of how scientists and science minded people can still be completely blind to their cognitive biases.

[@sujimtangerines]

OMG I've never heard anyone else question how dreams might connect to the universe... For decades I've had the feeling that my dreams are just the actions of the me in some other universe. That I'm seeing them, experiencing them sometimes, via some property of quantum entanglement.

[@brandonheath6713]

Maybe I misunderstood but there seems to be a logical fallacy in the explanation of FTL travel and causality. The example given of a vehicle outracing a radio signal to a distant star doesn't actually represent a violation of causality as far as I understand it. The causal connection between an event and it's interpretation is the transmission of information. If you send a radio signal, and then beat it to it's destination then yes of course you'll know what the signal is before receiving it but only because you carried that information with you. If instead a radio signal from a nearby planet was fired without your knowledge at a destination and you warp to that destination you'd be reaching that destination in the "future" from the perspective of the signal but you wouldn't be able to receive the signal in advance of its natural arrival because the reality isn't that you're going into the future, it's that we're already in the past from the perspective of distant objects, in reality you'd be arriving in the "present" relative to the destinations perspective of time. If I threw a ball down a football field and you traveled faster than light to the spot where the ball would land you would see you catching the ball in the present, but I wouldn't because the light from that event would still take time to reach me so in reality we'd be witnessing the same event taking place at the same time just from different relative perspectives. From your prospective it's your present which from your perspective is my future but from my perspective it's my present which from my perspective is your past. There is no violation there. You wouldn't be catching the ball before it arrived you'd just be seeing it arrive on your end before I could witness it arriving on my end but given that my perspective is in your past that makes sense. I would have only ever been able to see it happen later than when you did because the light from the event would take time to reach me. Like on the surface it sounds wonky because it suggests the same event is happening in two different times from a single perspective but that's not what is happening. What is actually happening is the same event is occurring at the same time from two different perspectives. The former would violate causality, the latter would not.

[@joehopfield]

Love the brachistochrone - trajectory connection! Thanks Dr T.

[@LEDewey_MD]

How on Earth did I miss this episode of StarTalk when it was uploaded?! Packed with profound questions, amazing answers, and incomparable humor!! ("SpinLaunch" is the name of the aerospace company attempting to cut costs of launching payloads into space using centripetal force.) Great show!! :D ❤❤❤

[@Astronomator]

To put it more simply: Everything is moving through spacetime at the speed of light. If you're not moving through space, you're moving through time at the speed of light. And if you're not moving through time, you're moving through space at the speed of light. And everything in between is everything in between.

[@alexanderdede6354]

Man, I love the amount of subtle puns and nuance of Professor Charles' conversations.

[@deenice616]

Awesome! Thanks for answering my question guys about the universe, time, and dreams! Love the show.❤

[@StarTalk]

Our pleasure!

[@DukarioBerlzec6]

@@StarTalk well star talk I wanted to know what happens if I build a ISS size object and it fits into a falcon 9 And it consists of a quantum computer And sollar panel s array then there is the necessity of cooling system and ECT but we put it in high solar Sun orbit and there we must might start to begin building a Jupiter's brain in Dyson sphere but as I Finnish

[@DukarioBerlzec6]

@@StarTalk I start to realize it's a lot easier and cheaper to build it on earth than in space and especially so close to the sun with minimal protection and its lots faster and easier on Earth to build a facility to house thousands then all the money to launch one to space so the only upside 5o strapping into a rocket and hurdling it to space is just to be able to say hey you've been working on this section if the son because it's piculuar well I have a parking space for 2 hour's so go look at the other side of the sun and you'll find beauty and cerenaty and I will get mankind to validate my parking ticket forward to colonize that PATCH of skies Niel deGrasse Tyson for that's the enthusiasm we need not to wait till oh cold war with China let's band together and go to space np it's to validate my claims and to block the most beautiful sceneries with a colonial outpost forward brother's the astronomers will not suffer without knowing my parking validation on my Tesla and or future starship like this isn't a ancient star Trek ERA Elon musk Plzen don't cancely Wright's to bear that flamethrowers you sold because if there are over civilizations out there I will show we are capable of toddler like magic tricks to them like tiny over here with his bubble gun (flamenwarther)

[@jaydavis9812]

By far one of the best episodes! Thanks NDT and Chuck!

[@VicVegaTW]

I didn’t know so much of this

[@jaydavis9812]

@@VicVegaTWtruth! It shifted my perspective of time.

[@MamaGemini68]

Mr Tyson & Lord Nice, thank you so much. I have always loved science since the 4th grade. Growing up in S.E., D.C. my life was very political with both parents working in politics but science held a special place in my heart & was always on my mind. Thank you, thank you, thank you 😊😊

[@monkerud2108]

its pretty fun to think about the fact that racecar drivers essentially solve a more complicated version of the brachistochrone problem by learning a new track. also its fun to try to do the problem with angular momentum, like a wheel rolling from one point to another, does it change?

[@sekaramochi1944]

Omg time rocket science and Gary and chucks too, pure love❤

[@elizondorj]

Great! Chuck Nice and Chuck Liu! If Chuck is in the show, it is a good show.

[@SchwarzSchwertkampfer]

*the best place to launch a rocket is the south, anywho I am not saying anything knew* . *Thank you for sharing your passion* .

[@NielvanSteenderen]

This guest is next level smart, and we are used to super smart. Incredibly humble too, I am really impressed with this lovely human.

[@louisel.sinniger2057]

What amazed me about Star Trek years ago and how it came true is the communications, i.e. talk out loud and request things happen Hey Google, or Hey Siri. Thermal thermometers just to name a few. I LOVED all that and I knew that some day these things will come true. Thank you Space Program for these advancements! To me the program moved us forward in MANY ways that most people have NO idea where they came from. Love science & technology. NEVER boring!

[@un_lucio]

I was shocked no-one mentioned Star Gate as a universe with wormholes 😲

[@geekexmachina]

One of my favourite books (which was a film too) is Lathe of Heaven by Ursula Le Guin. Where the protagonist has dreams which rewrite the past and therefore reality and his psychiatrist attempts to use it to make the universe better with terrible consequences.

[@CoderDBF]

Sounds interesting. Thank you for the suggestion, I will check it out.

[@Keyspoet27]

Wonderful book, but then, her books always were. I highly recommend her work - one of the finest science fiction writers, and one of our finest minds, ever.

[@dawnhansen7886]

You guys are Educational Entertainment to the MAX ❗️ ThankYou. ❤

[@jrmylnrd]

Always enjoy the topics and discussion. Especially when the scale of geekiness is referred to as infinite scale. Made me smile because I immediately started thinking about geekiness being relative to the speed of our thoughts (like time with speed).

[@topspacesource]

Great show about space time and dreams. Dreams are fascinating by themselves.

[@stevewise1656]

Wish the show was still on tv. There's nothing like this on weekly.

[@whydidmyhandlechangefromAlice]

I love how respectful Charles is toward other people’s beliefs. I could never be that diplomatic, someone starts talking about New Age stuff and my eyes automatically roll, like Westphal’s sign.

[@georgefeener8682]

Hey lord chuck you have the best job in the world working with these guys must be a blast

[@rayaterry5365]

I was today years old when I finally understood the theory of special relativity

[@johnherron3961]

Another good 1 guys! It's also possible that we do see into our future in dreams. Not everything is explainable by our current understandings.

[@trinaka]

I couldn't agree more. I dreamt of a terrible tragedy three hours before it happened. I have wondered if my mind picked up bad vibrations from the people that caused the tragedy

[@EmpyreanLightASMR]

One argument *for* seeing the future, that neither NDT or Charles mentioned, is lack of free will, which has been discussed previously on ST. so if the future is predetermined, then why couldn't the brain foresee that? If anything, it should be more impressive that our brain dreams as randomly as it does and doesn't continuously foresee everything.

[@floatingshoppinglist5193]

awesome episode guys. wanna see more of this.

[@helifynoe6956]

The best way to put it, is that for instance the magnitude of motion of your car, is equal to the magnitude of motion of a photon of light. Both share the same magnitude of motion. What you still can do to your car though, is change the direction of its ongoing motion within the 4D environment known as space-time. If you are whipping down a highway, and make a sudden turn to the left, your body leans to the right relative to your car, and the opposite occurs if you veer off to the right instead. This is due to sudden change of direction. If you hit the accelerate peddle, your body presses against the back of the seat, and if you hit the brakes, your body leans forward. Here too, this body movement is due to sudden changes of the direction of the motion of the car. Anyhow, if you throw together a simple geometric motion vector and length scalar representation of your cars or spaceships motion within space-time, you can then use it to derive the special relativity(SR) equations, and complete this task in mere minutes, even if you have no physics education at all. They currently do NOT teach this specific geometric method in schools, since updates or minor changes these days that lead to seeing things differently or from a different point of view, often are not accepted for over a 100 years.

[@earthoid]

I used to divide by zero on my Dad's Marchant mechanical calculator because it was fun to watch the gears and number wheels spin until they all reached their limit and stopped. That string of 9s was as close to infinity that the calculator could get.

[@ATLJonathanH]

Chuck makes this watchable.

[@AfricaWithDrAyan]

Great discussion. The perception of time is subjective across the globe. However, in some parts of the world (more Western), there is a monochronic way of seeing/experiencing ‘time’… but in places like Africa and Asia, ‘time’ is seen as a polychronic occurrence of their experiences - while at the same time... ‘time’ moves regardless of our experiences. Hope that makes sense?...

[@anon-san2830]

I come here for Chuck if I am being totally honest

[@techfan7808]

Love Chuck keeping it light for us lay people

[@Itsallfun3000]

Great show I always love Charles and his calm manner.

[@rezadaneshi]

When you lay down a cup too close to the edge of a table and think it may fall and then it does, did you create the fall or predicted it?

[@Nunya_Bidnez]

Charles is not a Geek. He is a Stellar Human

[@morlin101]

Who isn't these days tho

[@morlin101]

Charles are you you have to be me Charles is just very aware of himself in my hive for the geek and chief is a trinity and would be surrounded by The source Wall

[@morlin101]

Brought there's a Galaxy out there in Aquarius that I nose for me and it is called atoms for peace

[@morlin101]

I knew it the light has always vibrated from the stars and so it is the speed of light serving as as like a substrate for an even more complex information highway which infor travels at the speed of light

[@morlin101]

OMG r u Atlas

[@msjadhav5192]

For me is the most amazing thing about dreams, that i see clearly people i have never ever seen i my life for sure

[@majoorF]

hey Neill, great show! It really makes you think about the different topics. I've got a question for you, Regarding time. First let's set the playing field: Time, past present future. We asume that time goes in a line from the past through the present and into the future. Take the universe. There is a "now" all across the universe at the same time. We can get a glimps of the universe thanks to light that travels at it's speed through the universe. We are seeing "the past". Here comes the juicy bit. The question: Could the present "now" be the knifes edge that pushes through times probabilitywave. In it creating a seperation between the past and the future. But On just the right seperation of the past and the future. there are sparks akin to electricity sparks between the past and the future seperating the past and the future from the now? Wich would make virtual particles in a vacuum "lend" energy from the future to create the particles that imediately selfdestruct. It can not lend power from to far in the future because the "distance" is to great. What I'm trying to say is that : could there be a difference between spacetime and "time"? Great show thank you!

[@BenGrimm977]

Charles is the best guest

[@carloruiz2228]

Love the show guys!! I listen every night 🎉. But just curious, could you possible do a show on ghosts/pseudoscience? I trust science, but then there are people who say places are haunted like Alcatraz, old buildings, houses etc: places I would never sleep at. I would really love to hear the science of what these explanations could possibly be. Again, love your guy’s work! Both Chuck and Neil inspire all!

[@BradleyGamer-u4w]

The ice cream cone really got me 😂

[@schnioula]

*I love smart humans! Wholehearted* ❤

[@stukskekrapuul]

It's fascinating how stars and their light that is going at the speed of light also move around the massive black hole so in that way the light they emit also goes around the center of the Galaxy(the massive black hole)also actually moving the light at those enormous speeds depending the stars location(far or distant to the center). Just fascinating 😅

[@aanchaallllllll]

2:43: 🌌 Our perception of time is influenced by our perpetual movement through the fabric of space-time. 5:27: 🤔 The conversation discusses the concept of moving through space-time and the speed of light. 10:38: 💭 The query explores the connection between time, universe, and dreams and how they might be interdependent. 16:10: 🤔 The discussion explores the connection between dreams, time, and the universe, and the possibility of premonitions. 21:14: 🔍 The cosmic microwave background temperature is not constant everywhere in the universe due to contamination from foreground objects. 26:43: 🌌 Astronomy features foreground contamination and black holes have a singularity that is infinitely dense. 34:15: 🚀 Launching a rocket vertically is only for the initial build-up of speed, as the most efficient way to get into orbit is to travel horizontally. 37:13: 🚀 The conversation discusses various topics related to advanced mechanics, calculus, and space travel. 43:16: 🚀 The Star Trek crew discusses their favorite examples of scientific predictions that became true. 47:14: 📡 X discusses the potential use of radar technology to detect information about the human body. Recap by Tammy AI

[@sabinrawr]

For the first question, I'm a little bit surprised that this wasn't also framed as the way many people (like me) think of Time Dilation: the flatter your curve in the space dimension (faster speed), the less you can move through the time dimension, therefore you experience less time. The hyperbolic math comes out of the observation that the time dilation effect becomes increasingly extreme at an increasing rate as you approach the speed of light through space. Next, i would disagree that warp drive, such as an Alcubierre or similar, necessarily violates causality. While it's true that you might arrive at your destination before the radio signal, that doesn't imply that you arrived before the signal was sent. In the same way that when we eventually watch Betelgeuse go supernova, we will be observing something that actually occurred ages ago. While the Start Trek universe is full of timey-wimey hijinks, such as tachyons and Q, was drive isn't one of them. The warp bubble creates a pocket of spacetime within which time flows normally and is shunted to another place to be stitched back in. The bubble can move superluminally for the same reason that space itself is allowed to expand faster than light speed. The only piece of Trek tech that i don't see happening is the Heisenberg Compensator that allows the transporter to function without violating the eponymous uncertainty principle. My favorite, though, is the deflector dish. I don't know the details of the tech, but it sounds a lot like some of the ideas about how ancient Egyptians were able to move massive stone blocks that even today's cranes would struggle with.

[@Brick_Squared]

The explanation of space time and the fourth dimension makes "going back in time" make sense e.g. traveling from Italy to the US at the end of a vacation.

[@Flying_Blind]

You can go into your dreams if you train yourself over time. I know because I did the experiment. A physic type guy was on Johnny Carson years ago and explained how to interact with your dreams. The 1st time I was able to enter my dream, I couldn't believe it, but I was there. And I was part of the dream, I knew them, they knew me, we conversed and interacted. I did it a few more times and just kinda forgot about it ever happening. But it did, I could do it now if I prepped myself for a few weeks or days.

[@wrekced]

I have had dreams that were so accurate that I knew what another person was going to say before they said it. I have only had this happen twice. It was shocking when it happened and I have never been able to make it happen on my own. That does not seem to be a retroactive modification of my memory.

[@lemongavine]

Deja Vu maybe?

[@bitwise2832]

Another excellent production. Thanks to all of you.

[@sapnaa6576]

At 8:43 Charles says the vector is diagonal when we move. When we are in airplane or spacecraft. I am confused about this movement. If we are still still on planet aren't we moving indirectly? Planet around sun, sun around center of galaxy, galaxy moving away from other galaxies? What if we are walking on the planet? What is the definition of this movement?

[@broduh7630]

yeeeeeeeeeeeeeey Charles Liu back in the house, i really missed him

[@utility-rv6qt]

Tautochrone problem is the inverse The Brachistochrone problem The Brachistochrone problem is a classic physics and mathematics problem that dates back to the 17th century. It deals with finding the curve along which a particle will slide without friction between two points in the shortest time under the influence of gravity. The term "brachistochrone" comes from the Greek words "brachistos," meaning shortest, and "chronos," meaning time. In simpler terms, the problem can be stated as follows: Given two points A and B in a vertical plane, what is the shape of the curve along which a particle will slide from point A to point B in the least amount of time, assuming there is no air resistance and the only force acting on the particle is gravity? The solution to the Brachistochrone problem is a curve called the cycloid. The cycloid is the path traced out by a point on the rim of a rolling circle as it moves along a straight line. It turns out that the cycloid is the fastest path between two points under the conditions mentioned above.

[@ATL_Taetae]

Hey Neil!!!! Did you know @beyonce👸🏽 referenced you on her Renaissance tour after performing alien superstar 😅😅😅👀👀👀👀👀

[@kaaiy]

I know exactly what sir Gary is talking about because its not just the possibility of it happening but the details that don't exist as of your present experiences and recent memory. I had the same thing about a sports day that involved a boy I met on the day but I remembered his face which should not be possible because the brain does not create faces.

[@hotplasma]

In term of Star Trek tech invention, i think translation apps on our phones are perfecting their way to Trek's universal translator.

[@Sammasambuddha]

Yup

[@hotplasma]

@@OscarLangleySoryu In Trek's universe, they did attempt to address the universal translator limitation. TNGs episode Darmok (S5, Ep 2). But I digress. 🙂 Within Earth cultures, using language databases, I think a Trek universal translator scenario where one's words are instantaneously translated thru an app and/or devices allowing for (mostly) seamless conversations is almost there. I say mostly because there still might be situations when some meanings are lost in translation.

[@Sammasambuddha]

@antiMAGA And just the last ten years, google Translate (now with AI (bard) is quite accurate and quick.

[@eranlevy4082]

Very interesting, mind provocative - and funny! Thanks for this excellent content!

[@sekaramochi1944]

Pure love Neil Charles Gary chuck Please please please never stop ❤

[@maxwu3395]

I want to know if the perception of the passage of time is relative according to velocity and gravity, how do we measure the age of the universe? From whose perspective?

[@alohaarianna]

I am glad I found this podcast!

[@nicko7238]

Welcome 😀

[@wearethefruitoftheuniverse]

The metaphysics of the universe is the probability for survival the form bestows upon the species. Whatever works, survived, whatever works faster dominates, whatever works efficiently takes over.

[@umutkarakurt6017]

We all have a friend like Gary... No matter how scientifically you try to handle their "experiences", all they want to hear is "Yes, you are special." 😁

[@Nowhere-to-go52]

Chuck Liu !!! Missed you!!

[@stevendean6682]

I have a question about the cosmic microwave background, how do we know that that phenomenon isn't from the big bang but actually light from distant galaxies extremely stretched out due to red shifting?

[@pryguy1099]

Episode made me sub 😊

[@ZeroOskul]

23:47 Somebody get Neil a copy of *"Flowers For Algernon"!*

[@BadDadDodge]

the cosmic gang!!

[@mikejettusa]

Entertaining and enlightening, great combination

[@disturbedrebirth]

This episode was so much fun.

[@AbhishekKumar-db5om]

Best podcast ever

[@tanbui7869]

Lfg Tyson, Nice, O'Reilly, and CGO Liu!

[@drb369]

The universe feels everything

[@wallykunz8641]

On the moon, with no atmosphere, does the most efficient path of ascent more closely approximate the Brachistochrone curve? Or, should you launch horizontally at a tangent and then keep changing the angle to match the tangent at the new altitude?

[@braianmenchkoff7704]

About the dream, There is also another factor that your mind also might cause your dream to happen in real life. You have a vivid dream and in that dream you make your opponent mad and he will punch you; now in real life you happened to be in a same situation and your mind remembers the dream and make you act in a way that your opponent might punch you

[@abigailaustin4467]

I want people to notice how easily they discount that one guy's lived experience, even suggesting that he can't trust his memory of his dream rather than even admitting the possibility that there may be something that science can't explain or that something supernatural was going on there. I think that's important to note, because scientists have many answers but not all the answers, so you have to trust yourself and what you sense to some degree in spite of all else.

[@alexmykim5354]

I never be so annoyed of youtube commercial on a video😩 always listening startalk while sleeping very nice for learn and clear the mind before sleep and then..KZbin commercial poppinh before every intéressant response or topic😅 agine you on ur bed listening, looking to the galaxy and five seconde later we have a Modern Warfare III commrcizl😂 love from frence❤

[@ThunderTurtle7]

The realization that a rocket trajectory is just the brachistochrone problem was very cool

[@ambience09]

About the time discussion: if nothing would move, not even an atom, not even photons, not even electrons, no energy moving between elements, no sting moving, so there is no movement and no change at all, how would we know, if time exists?

[@janicepedroli7403]

Have to go pick up medication but I have to hear this.

[@sekaramochi1944]

Dude this video this on earth so we're moving through time into the future and in space too

[@rodney6045]

41:37 Love how Charles throws in Stairway to Heaven lyrics like it's part of the discussion.

[@reportedstolen3603]

4:44 Charles smoking a little “Albert Einstein 1905” is amazing 😂❤