IS TIME TRAVEL POSSIBLE?

[@LondonCityGirl]

To further your skills and support my channel in the process, sign up for their 2-month FREE trial via the link skl.sh/londoncitygirl2 I’m so pleased to be working with my first official sponsor on this channel. I’ve been creating content for LondonCityGirl for years and I’ve always felt that when it came to partnering up with brands I’d only ever do so if it fitted the ethos of the channel. And then along came Skillshare! :D

[@legendaryzet8450]

Good luck on the partnership🤗

[@maruf7956]

Do portal and portal 2 games explained in real life video

[@boouyayme]

Even tho time passes slower for the people with stronger gravity. Can they still age the same? The time that slows down is the clock. But how about the biological clock? Can it be that the time its takes to travel near light speed is just fast forward instead of being stretched out so you can still age and come back in the future aged 50 years aswell just your perception would be 5 years and the person in earth's perception would be 50. Also I understand that travel back in time would only be at the time you left meaning that you can travel long distance into 1970. But that would mean that you leave 1970 , travel for 50 years and come back 1970 looking 50 years older. Are my theories tested already?

[@fanstream]

My niece loves your videos and suggested I take a look. Very well done. I also enjoyed the interpretation/pov/explanations of the Black Mirror episodes, Mulholland Drive, Solaris and Primer...bravo!

[@helderrocha2129]

Time travel to the future is quite easy. You you just have to wait, the time will pass. :) Sorry, I just could not resist to make such an obvious joke.

[@ramanroy7910]

😂😂😂😂😂

[@jefftan3107]

kzbin.info/www/bejne/hpyucnuopKeHqqM Some consideration 🤔🤔🤔

[@notitlesonlyvibes4695]

If you travel more than the speed of light you might go to the past.

[@nigelmathewsnrm]

Not 'the grandfather paradox' again! If you could set when you travel to, if you did want to kill your grandad, you would have to go before he died but after your parents had had you, then you would still have been born but the paradox becomes a case of would your life have been different without him around, if he's being there was the cause of your early life and you wanting him dead.

[@LondonCityGirl]

The whole point of the paradox is to explore what would happen if you went back to BEFORE the grandson had been born. We're questioning what would happen to the grandson's existence - that's how the paradox arises. You're posing a different hypothetical which doesn't give rise to the same dilemma and that's why it's not used in these videos.

[@nigelmathewsnrm]

Which in a way is why I replied with the other hypothetical situation, as most videos on KZbin about Time Travel seem to use the Grandfather paradox as a indicator that Time Travel isn't possible because of the paradox. I was not against the video 'cos of the way it was made or 'cos of who made it, as the subject is indeed interesting and hopefully long may it continue to be.

[@Masteridea101]

Whenever I search videos about time travel, lot of videos pop up mentioning time dilation and nothing about time travel. You have made it clear . Thanks. Wonderful video as usual.

[@paolofaccini8]

In interstellar time flows more slowly on the watery planet due to the gravity of the black hole around which the planet orbits, not because of the planet's gravitational force. One hour on the planet is equivalent to about seven years on the ship.

[@LondonCityGirl]

In the video I said 'a team of astronauts visit a watery planet where the gravity is significantly higher than that experienced on the ship they have left behind' so I'm not implying any reason why the planet is in a higher gravitational field compared to the ship. The reason why the black hole is not mentioned in the video is because we're not exploring the science of Interstellar (I'm working on a video of that at the moment). I wanted to keep minds focussed on the difference in gravitational fields between the planet and the ship because that is what causes the difference in time between the two.

[@ThePissedOffOwl]

Not sure how this got into my recommended but I’m not complaining

[@LondonCityGirl]

Ah amazing to know it's been recommended to people 😀

[@TheNinhja]

I love you movie analyses and hope you do more in the future!

[@LondonCityGirl]

Yep, I'm currently working on The Clockwork Orange, Interstellar and the Black Mirror series. It might take a while to get them all out as I'm working on multiple projects at the same time. If you have any suggestions make sure to leave them for me as I keep a running list of film analysis requests from subscribers :)

[@scienceboy20814]

This channel deserves more views

[@louisuchihatm2556]

My grandfather telling me some shithead tried to shoot him and missed all shots! Me: 'The Universe is a mystery'

[@OgLockpin]

Congrats on the skillshare sponsor. Well done graphics and animation!

[@LondonCityGirl]

Thank you! Appreciate the support as always :)

[@szelvaraj]

Thank you London Girl 👧

[@hazelordwebtv]

0:28 also timezones

[@jinks908]

"A bullet cannot hit a target before the trigger of the gun has been pulled." *TENET has entered the chat.*

[@alexhaynes6217]

Brilliant as usual. Keep it up.

[@LondonCityGirl]

Aw, thanks so much! I appreciate the comment :D

[@legendaryzet8450]

I always loved your explanations since it makes me understand easier. Btw, how do you get this information?

[@LondonCityGirl]

Just research and I've been studying popular physics as a hobby for several years now so I was already familiar with most of the theories and concepts presented in the video. It was then a matter of putting together the script and the graphics in a way that I thought would be the easy for most of us to understand :)

[@legendaryzet8450]

@@LondonCityGirl Ah, thanks for your hard work. Also, who was the guy who replied to you in your comment.

[@TJ-uu7uj]

So if we moved deeper in to space will time move even more slow for us? rather then if we just stayed beside it like they do on the international space station

[@hellonafeeshello3225]

London, beautiful city, beautiful people. And great explanation as usual.

[@zk420zk]

It is possible to travel forward in time. They've experimented with atomic clocks on moving aircraft to test time dilation and they run slightly slower.

[@Ravi-xf8dw]

Loved your Mulholland drive. Great to see you back. I forgot that I subscribed to your channel.

[@LondonCityGirl]

Haha, thanks for watching 😁 I actually never went away and try to upload every month but because these videos take so much time and research there has to be gaps between uploads.

[@hcm9999]

6:44 There is another solution to the time travel paradox. Time travel not only creates a new future where the time traveller does not exist, but also a new past where the time traveller NEVER existed. Let's suppose you create a spaceship that travels faster than light. According to Einstein's relativity, velocity affects the time flow. The faster you move, the slower time flows. When you reach the speed of light, time stops completely. When you travel faster than light, time flows backwards. Inside the ship all laws of physics are reversed. Instead of getting older, you get younger. Instead of things falling down, things go up. Instead of walking forward, you walk backwards. Everything happens like a movie being rewinded. When the ship finally returns to Earth, a much younger astronaut emerges, with no recollection of having ever entered the ship. Now let's suppose you are able to do the opposite. Let's suppose you are able to make time flows backwards OUTSIDE the ship, instead of inside. OUTSIDE the ship all laws of physics are reversed. Instead of people getting older, they get younger. Instead of things falling down, things go up. Instead of walking forward, people walk backwards. Everything happens like a movie being rewinded. But the time traveller is inside the ship, not outside. Inside the ship time still flows forwards at a speed of one second per second. For the rest of universe, outside the ship, time flows backward, with people walking backwards. Outside the ship there is no time traveller to walk backwards. The rest of the universe which is flowing backwards in time CREATES A NEW TIMELINE, A NEW PAST WHERE THE TIME TRAVELLER NEVER EXISTED! When the ship finally arrives back on Earth, the traveller discovers a new past, one in which he never existed. He is still able to find his parents, but they never gave birth to him. He is able to find his children and grandchildren, but they all have a different father and grandfather. He is still able to find his facebook page, with photos of himself, but they were created by a different person, with all the pictures digitally altered. The only thing in common between this new timeline and the old timeline is the moment the time traveller departed. That moment is the initial condition of the system. By applying the laws of physics, you can determine the final condition of the system some time in the future. But by applying the same laws of physics IN REVERSE, you can find a PREVIOUS conditon of the system IN THE PAST.

[@MateusSFigueiredo]

It's an interesting theory - to think that time would fly backwards in a way that the time traveller did not exist anymore - but it's way too complicated and has too many loose ends.

[@hcm9999]

It is complicated? The only thing I did was apply all the normal laws of physics in reverse, to find a previous condition of the universe. It allows time travel which is just time flowing backwards. And it also solves any paradoxes. There are no paradoxes in my solution. What loose ends do you refer to?

[@MateusSFigueiredo]

@@hcm9999 the loose end of how the time traveller was born, for example.

[@hcm9999]

@@MateusSFigueiredo That is not a loose end. He was born in a different timeline. Time travel as I have defined is simply time flowing backwards. As time flows backwards, it creates a new timeline, one in which the traveller never existed. You apply the laws of physics to determine the FUTURE state of a system, or the PAST state of a system. The equations are exactly the same, you only change the value of time. It means that both the future and the past are not pre-determined, they depend on the initial condition of the system. If you change the initial condition of the system, you can change both the future and the past. Because time travel necessarily creates a new timeline, it is not possible for the traveller to return to his own past. He will return to a new past, one in which he never existed. He could kill his own parents and it would make no difference. No paradox occurs.

[@Kevo216666]

Your explanations are excellent. Keep 'em coming!

[@scottnorman953]

Great video London Girl. Took me a while to find it. But pleased I did.👍

[@Kevin_09_]

this was a very interesting video indeed , but I have a question. you said the time for the astronauts is slower but shouldn't it be faster because they're further from centre of gravity? can anyone explain it? Maybe I understood it wrongly

[@legendaryzet8450]

Yea, I think she kinda messed up.

[@gregorsamsa3016]

They travel very fast. I'm guessing this is fast enough to overcome the effects of their distance from gravity.

[@LondonCityGirl]

Erm, perhaps a quick google would help before assuming someone messed up :) It's a widely known fact that time on the ISS runs slower than on Earth and the reason as Gregor rightly points out below is because of the difference in speed. The Earth is in a stronger gravitational field however the ISS moves at a faster speed - take the two into account and the net outcome is that time runs ever so slightly slower on the ISS.

[@LondonCityGirl]

@mr Flanagan - just replied below :)

[@Kevin_09_]

@@LondonCityGirl thank you for clearing things up, I now understand it

[@sankydd807]

please make a video about netflix's dark series!

[@ramanroy7910]

Yep i like that series

[@axelblaze007]

yeah surely enjoyed!!

[@LondonCityGirl]

Thanks for watching!

[@KuljitIssar]

is time travel to past future really possible and how i want to do it please help me out

[@personanongratis]

Some guy in the comments is baffled that you didn't explained how going back in the past works practically,while researching YT on the subject !Well he is misguided,he should go to Skillshare for that ! :-)

[@rayo1883]

Einstein also said that if you really understand something you can explain it to a five year old. Several decades too late, but thank you, great job.

[@DeanMilne01]

Hey you should check out Dark on Netflix!! If you like timetravel! Not enough people watch it !!

[@LondonCityGirl]

So many people have recommended this to me - I really have to check it out!

[@qaiserghirano5684]

Also there is and other reason that we can't travel back in time. "Atom's Neucleus Suface"

[@Leto85]

By now scientists have taken 'a picture' of a wormhole. I assume they now do exist. Time to dive in?

[@JoyOgbatue]

This is great knowledge! I wish nobody would age as we travel to the past or the future. 😭 That’s crazy how 2 or 3 hours of time travel equals 23 years we’ve missed.

[@theolamp5312]

Hi Samantha - Thanks for this video. As with your science stuff, I will have to watch it a few times to soak it all in. As we know, the possibility of time travel is linked to getting close to the speed of light. I also know that as you approach the speed of light, the mass of the moving object approaches infinity. Making surpassing the speed of light impossible. Well, I still don't believe it's impossible. But, I probably watched too many Sci-Fi movies. Warp 8 sweetheart. Best wishes, Ted

[@lawensardar2148]

i didn't know u were that beautiful

[@WesleyWyndam-Pryce]

Thank you

[@gameletic8046]

This is a great content

[@hcm9999]

There is a solution to the time travel paradox. Time travel to the past creates a new past in which the time traveller NEVER existed. Let's suppose that your time machine is a spaceship. Inside the spaceship time flows at normal speed forward at one second per second. But when you travel back in time, time outside the spaceship flows backwards for example at 10 years per second. Outside the ship all laws of physics are reversed. Instead of getting older, you get younger. Instead of things falling down, things go up. Instead of walking forward, you walk backwards. Everything happens like a movie being rewinded. But the time traveller is inside the ship, not outside. Inside the ship time still flows forwards at a speed of one second per second. For the rest of universe, outside the ship, time flows backward, with people walking backwards. Outside the ship there is no time traveller to walk backwards. The rest of the universe which is flowing backwards in time CREATES A NEW TIMELINE, A NEW PAST WHERE THE TIME TRAVELLER NEVER EXISTED! When the ship finally arrives back on Earth, the traveller discovers a new past, one in which he never existed. He is still able to find his parents, but they never gave birth to him. He is able to find his children and grandchildren, but they all have a different father and grandfather. He is still able to find his facebook page, with photos of himself, but they were created by a different person, with all the pictures digitally altered. The only thing in common between this new timeline and the old timeline is the moment the time traveller departed. That moment is the initial condition of the system. By applying the laws of physics, you can determine the final condition of the system some time in the future. But by applying the same laws of physics IN REVERSE, you can find a PREVIOUS conditon of the system IN THE PAST. No laws of physics are violated. No paradox is created.

[@hyper_dragon6302]

I wish time travel to the past is very possible

[@Leto85]

Einstein proved that time and space are connected. LondonCityGirl proved that brains and beauty are connected.

[@sillveeacrushh1666]

You see, ignorant people say God doesn't want us to time travel because we ALL go at the same speed one hour, one minute, one second at a time and this video proves that's not the case! God must want me to time travel because time is far different everywhere, the time in Georgia is far different then Washington DC and Japan!

[@maruf7956]

Do portal and portal 2 games explained in real life video

[@alienbob21]

misquote about Interstellar. The 1 hour on the planet = 7 years on the ship. you stated 7 hours. otherwise he would have only aged 21 hours or so not years.

[@abhishes]

Time travel to the future "may" be possible. Man I have been doing time travel to the future ever since the day I was born. so of course its possible. we all do it every second of our life.

[@johnnypocketrocket]

Time travel made easy, now I understand... 😁

[@cultusfetus]

i just discovered your channel. im so so so so soooooo in love woth your content. high quality stuff

[@StanAlter]

My name is Alex and I'd like to time travel.

[@markpizzarello3655]

Wouldnt be cool if time travel was possible

[@markpizzarello3655]

I was tryna make a meme

[@anilin6353]

Backwards time travel and interdimensional travel violates the laws of thermodynamics.

[@johnjay6370]

You would have more energy at one time and less at another....energy can never be destroyed or created just changed.

[@anilin6353]

These forms of travel would create an open system, and would break down the second law of thermodynamics.

[@johnjay6370]

@@anilin6353 also everything is moving so even if it was possible you would most likely end up in the middle of Space.

[@anilin6353]

@@johnjay6370 the space time of the past or another dimension is not the same of the origin. The 2nd law requires a closed system, it would open the system. Furthermore, moving more energy and matter into the new space time would have the effect of creating new matter and energy which would have an unknown effect.

[@bronsonb2223]

Oh

[@bronsonb2223]

Yes

[@taima6138]

It is .,.

[@ritvikdharnendra4440]

I time travelled to 2021 im not stuck in 2020 anymore

[@JamesLawner]

My idea of time travel to the past and changing the past is that it creates a branch timeline, and from there it can go in 2 ways: 1. You cannot return back to your timeline, because history has changed and therefore the branch timeline is now the current timeline. (If one were to kill their grandparent(s) in the past, they could still exist in that timeline, because they came from another one, but they're now stuck in the past) 2. You can return to your timeline, but nothing would've changed based on what you did in the past, because reality keeps on going. If this is a bit confusing, think of time as a river running straight, and if you divide a portion of the river, you now have two river streams running concurrently with each other.

[@cosmicshadow2107]

True time

[@hawrazothman8688]

Wow

[@johnjay6370]

The earth is moving the solar system is moving the galaxy is moving everything is moving....even if you could travel back in time you would most likely end up in open space....just saying..

[@RobGravelle]

I wonder what would happen if you accidentally prevented your parents from falling in love?

[@LondonCityGirl]

Back to the future! 😀

[@LPFROMDAWEST]

I think you wouldnt have been born

[@FortniteInfoNews]

i wish time travel was possible

[@FortniteInfoNews]

GUYS GUESS WHAT

[@louisuchihatm2556]

You still wish it was possible?

[@aftermathgoogle578]

No. You cannot travel to what does not exist

[@gilgamesh310]

Dark does time travel to the past about as accurately as possible.

[@adamskadanek2526]

First.

[@LPFROMDAWEST]

Time travel is impossible because the earth is constantly spinning and rotating around the sun youd most likely end up in outerspace if attempted

[@KuljitIssar]

is time travel to past future really possible and how i want to do it please help me out