Do the Past and Future Exist?

  Көрүүлөр 668,998

PBS Space Time

12 күн мурун

Is all that exists just whatever exists right now? Is the past erased and the future a void yet to be filled? Well, the answer lies in between the past and the future - in the elusive, ever-moving eye-blink that we call the present.
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Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Camera Operator: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
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Tadesse H
Tadesse H Саат мурун
The past exists as long as memories exist.
David Thomas
David Thomas 3 саат мурун
"There wasn't a time when there wasn't." Dai Bach - My Psychic Life
mark jaycox
mark jaycox 3 саат мурун
You cannot talk of what you have not measured, so until you define Eternity 10,000,000,002,020 you cannot be defined by it. Time travel begins like this: 10,000,000,002,020. Did you feel that? You just moved Eternity. You moved it from thought to sight- space travel!. There is no 2020 because trees are there 5000 years and they are fact. Fact you can touch and see, and yet your mind does not measure the space sticks sticking out of the ground have stuck. You are not conscious of fact, you are conscious of the feed 2020 fed you. The illusion is what you are conscious of, and the illusion of time can only provide the illusion of mind. You are not conscious you are not conscious until you are conscious-0-of beginning consciousness. Can you tell me the moment your consciousness began? Then how do you know it has?
mayoite160 3 саат мурун
i just had to watch that right now scene from spaceballs
Darek Tidwell
Darek Tidwell 7 саат мурун
Mind blown. Its as if information from carrying light is filling up the universe in all 'time like' tenses. Maybe the growing space between everything is just memory allocation.
Jason Burns
Jason Burns 7 саат мурун
This is my favorite subject.
Michael P
Michael P 10 саат мурун
Isn't the universe expanding in all directions and not just one, cone form? Whats behind us if we are looking at the circle of the cone?
Michael P
Michael P 11 саат мурун
Nothing humans ever postulated to be true, has ever been.
boreddude123456 12 саат мурун
I think I understood at least 3 sentences.
timber72 14 саат мурун
Total nonsense! Everyone knows that only women are from Venus.
Stephan Marinovic
Stephan Marinovic 14 саат мурун
Probably a stupid question, but is it possible that some of the missing or hidden mass we believe exists based on models, could just exist in the "future" part of the block universe that we have yet to traverse through? Like, if it didn't follow the same path through the block universe that we are going through?
Chris Maer
Chris Maer 15 саат мурун
If you sit perfectly in the on the event horizons of two binary black holes (kinda like their barycenter point), would you never age?
LBooGie 17 саат мурун
The past existed, the future is yet to exist, and time doesn't stop, therefore there is no present as time is always moving forward to a future that does not exist yet!
Alexandria 17 саат мурун
If we are living in a martrix, i want to get out in this horrible time.
exitolaboral 18 саат мурун
Past and future seem to be just configurations of the available mass / energy. These configurations change according to the known physic laws. Each of the "slices" in time are just configurations of the available mass/ energy. And time is a local phenomena. Einstein says so. There is no "universal time" for the whole universe. The whole idea of "existing past" or "existing future" universes goes against all current know physical laws.
Ardulca Silvara
Ardulca Silvara 18 саат мурун
Stop trying to sound British to get followers, it was cool 60 years ago when it was rare to hear in USA. Now knowing that you are acting, it gives me goose bumps. Normally I shouldn't get bothered but I guess because you are all faking an environment, it gets more of my judgmental side out, so 2 more evolutionary feedback for you to get more money ehm I meant "your beloved followers" 1) work on those shoulders and chest 20 mins a week, if u do 2 push ups a year you'd have a proper size of chest so you wouldn't look like you are coming from 2068 with a useless android body and a large thinking head. 2) loose that button on your shirt. On top of all this, it makes it way too clear that you are TRYING to be accepted by your donators to make that money by getting moooore viewers.
Marvin Edwards
Marvin Edwards 18 саат мурун
Stuff moves. Where it was earlier is the past. Where it is now is the present. Where it will be soon is the future. This is the case regardless of our observations. Time is not a block in empirical reality.
itzybitzyspyder tv
itzybitzyspyder tv 19 саат мурун
*short answer:* Yes. *long answer:* Yeeeeeees.
Andrey Lebedenko
Andrey Lebedenko 21 саат мурун
The children of light can see as "now" only what they can see now.
Clap Trap
Clap Trap 21 саат мурун
So maybe the big bag wasn't a creation event. Everything already existed. The big bag just kicked off time.
Breaking Bald
Breaking Bald 21 саат мурун
you're using too much QUOTE SINGS it's Distracting
Chad Judd
Chad Judd 21 саат мурун
Why don't you ask Trumplican this question.....F=-F
Rob Mai
Rob Mai Күн мурун
The FIRST KGpost video I have ever played on
bute123 Күн мурун
Jeison Almanzar
Jeison Almanzar Күн мурун
What if the dreams we have is our way of being an observer. We gaze into several parallel realities without being noticed by ourselves unless you’re a lucid dreamer. If that makes any sort of sense.
Master Daniel Godwin
Master Daniel Godwin 3 саат мурун
Explain more
RypeDub Күн мурун
What the heck is music then ????
Angel Martinez
Angel Martinez Күн мурун
thomas makucevich
thomas makucevich Күн мурун
Today is the day before yesterday of the day after tomorrow.
cobb 01
cobb 01 Күн мурун
This guy watched TENET in 2021
t3hMEME Күн мурун
Does the concept of block time work with Many Worlds theory?
S.L.S Күн мурун
Since time is not linear, then try viewing it as if you are sitting on a vinyl record that just goes round and round. The is no past, no future and no present because time is a human construct and has no reality.
Lindsay Maye
Lindsay Maye Күн мурун
Hey thanks for this it's great to find the multi verse perfect in all ways my Lord. I love the idea, it's beautiful, I would like to see someone other than psychics included, you did great!!! Also, I am happy that you've given me your time. Life on Venus heheh!!!! To know each planet out there, would take a lifetime, I don't know what I want to know. I was shocked in even being here. I am happy I am with God. Forever and ever.
Zentonix Күн мурун
Here look I can say that scientists that think one day time travel could exist are wrong its not like everything is being saved to a memory card once something has past then its gone and the future isn't really planed I'm a christian and I believe god has the future In store for us.
Yves Stuka
Yves Stuka Күн мурун
At 6:16, this video claims "Nothing, not even information, can travel faster than light." That's ironical, because actually, only information, for the time being, has been PROVEN to be able to travel faster than light. Atoms entanglement proves it. You act on one atom, and its entangled atom, whatever the distance between these two entangled atoms is, will react the same way. Therefore, information CAN travel faster than light.
Bob Spencer
Bob Spencer Күн мурун
Interesting however still guesses, like everything else about time, and beyond space. We don't know, so men will give their best guess. I put it in the hands of the one who created time, and space for us to play in.
Bob Spencer
Bob Spencer 9 саат мурун
@Allan 112358 Guesses are all men have, answers are from the one who created all things, even time.
Allan 112358
Allan 112358 20 саат мурун
Talk about making guesses about time and space!
chronoss chiron
chronoss chiron Күн мурун
i believ that like absolute zero there is a absolute time just that none can ever get that in nature
Srinivasa Indurthi
Srinivasa Indurthi Күн мурун
What I am going to do next moment can not be in anybody's past. No confusion.
Jaxxon Balboa
Jaxxon Balboa Күн мурун
The Past the Now and the Future all "exist" at the same time but only at one point. At this point we are living in all three but can only operate in the now.
Hati Keseorangan
Hati Keseorangan Күн мурун
The last answer is : if time does not exist. ..
Bryce Graham
Bryce Graham Күн мурун
If our consciousness is like the music being played on a record, would the needle be our soul anchored outside of spacetime, experiencing our consciousness as it moves forward?
ninjxxitty Күн мурун
i wonder what the difference in how we perceive time feels if we felt earth come to a slowing stop through space as apose to what it would feel like just to be suspended completely still in space affected by nothing. i wonder if time would somehow shift on a new wavelength.
ninjxxitty Күн мурун
If one were to travel between layers of the block universe you would need to be a portal?
buzzcrushtrendkill Күн мурун
Yup, only the present exists. If not, then manifest the past and future. Cannot? Then it's theoretical gobbledygook.
Ronald Molag
Ronald Molag Күн мурун
is this about selling T-hirts or what?
carl gangl
carl gangl Күн мурун
Now exists the future will the past is gone.
oOo Gimmy
oOo Gimmy Күн мурун
This episode... is out of my mind... hard to see the light at the end of tunnel... :) for me :)
Christopher Ellis
Christopher Ellis Күн мурун
In memory and potentially. Now is but a node in space-time, a particle, perhaps.
Elias Übelhör
Elias Übelhör Күн мурун
If time is just a dimension like the 3 space dimensions, does that mean the future and past already exist "on the time axis" (if you'd have a 4d coordinate system)?? And if so, does that mean the future is already determined?
Lord Random
Lord Random 2 күн мурун
I highly prefer the new format of videos with more animations + pictures. Awesome!
giuseppe3010 2 күн мурун
Summary: The present exists... the past existed... the future will exist !! Want me to draw it on paper for you??
giuseppe3010 2 күн мурун
Your LIFE consists of only two dates and a dash --- make the most of the dash !!
Michael Brown
Michael Brown 5 саат мурун
For those who don’t understand the reference, google the “dash poem”. It was a eulogy at someone’s funeral and it’s very good and thought-provoking.
InfamousX 2 күн мурун
To the third dimension time exists, but to the fourth dimension it is practically non existent
Alberto Artilheiro
Alberto Artilheiro 2 күн мурун
Amazing video as always! Tremendous production value, topic, explanation and script :)
JDR10 2 күн мурун
I have been thinking about this guys, time does not exist. Only distance perceived as time.
Ashish Patel
Ashish Patel 2 күн мурун
It does in Hinduism
Michael Scott
Michael Scott 2 күн мурун
Don’t cameras and memories prove the past exists?
C Alexander
C Alexander 2 күн мурун
No neither future nor the past exists. Everything ever from the moment of universes birth to death is happening exactly at the same moment. Everything is everything we are one. Each individual doesn’t exist we are one. People animals plants the planet all planets all life on them the entire solar system galaxy and universe all life in it all matter in it is all ONE. At ONE TIME.
ja v
ja v 2 күн мурун
When we remember something is it happening somewhere else?
Christopher Johnson
Christopher Johnson 2 күн мурун
Sounds like there is a god
Adam Ant
Adam Ant 2 күн мурун
Time and space flow through us!
Adam Ant
Adam Ant 2 күн мурун
No past no future we are the infinity
Quetzel Coatl
Quetzel Coatl 2 күн мурун
Quetzel Coatl
Quetzel Coatl 2 күн мурун
You better have Jesus Christ
Zephiroth Stryfe07
Zephiroth Stryfe07 2 күн мурун
So this video(4 me) WAS made in the past, while i'm writing all this words and letters are becoming the past too(scratch my nose), is also on my past now. BUT people in the future will read this(i think). Also, we live in The Lego's Universe now?. Nothing in the Universe is a Line, a Square a Brick or a Block, not even Clocks, real ones i mean not digitals. So how can i believe anything this dude says, said or will say, when you try to explain Time and Universe with Blocks, Lines, Dashes and Dots?
islandonlinenews 2 күн мурун
The present isn’t a moment it’s an eternity.
daGfam08 Күн мурун
You write my friend we always live in the moment. you can remember the past and imagine the future.
Gerard Ahern
Gerard Ahern 2 күн мурун
These are the same consepts as the bible codes.
Nikki Staxx
Nikki Staxx 2 күн мурун
Welp, I’m gonna have to watch this video a second time.
Hexi 2 күн мурун
No, because time does not exist. It's simply a unit of measurement to measure the rate of movement.
Richard Garcia
Richard Garcia 2 күн мурун
Also! “I think, therefore I am.” Why is that everyone’s go to for philosophical enlightenment? I’m tired of hearing it because it’s non-sensical and only reinforces the unsophisticated ideology that you are anything other then your thoughts. You don’t think! “YOU” CANT DO ANYTHING BECAUSE “YOU” DON’T EXIST! At least “you” don’t exist as anything other then everything else. It’s so simple and elegant, how is this not conceivable to people?
Richard Garcia
Richard Garcia 2 күн мурун
Both ideologies about the “universe” being a stupid mechanism or being created are very wrong.
MilesLEGEND Күн мурун
Jack B
Jack B 2 күн мурун
No, and neither do Birds. Get over it.
Richard Garcia
Richard Garcia 2 күн мурун
With our Right hand we fight to understand and rationalize our existence but with our left hand we sabotage our ability to be aware of it. We humans have a sort of natural psychosis about ourselves.
Richard Garcia
Richard Garcia 2 күн мурун
For all of the religious people, I’ll explain it this way. God is so bored of being God, God spends all of eternity pretending not to be God.
Richard Garcia
Richard Garcia 2 күн мурун
As hard as it may be for you to accept, there is no Universe outside yourself. It’s inside you and you’re inside it. We exist like a Klein Bottle in relation to everything “else outside you.” In reality you can only say what you’re not, you can never really say what you are. There are many common sense ideas that give away the show, the only reason you can’t understand is insecurity. Fear, power, motive, desire, it can all be chocked up to; we really don’t want to know because ignorance is bliss.
drewbert83 2 күн мурун
Think of alpha centauri. We observe it as it was 4 years ago. Things have happened there that we have no way of knowing. And so if the future already exists for alpha centauri, then it must also already exist for us. Eternalism confirmed.
Let’s take a walk
Let’s take a walk 2 күн мурун
Past and future exist, but the present does not.
Wally Wally
Wally Wally 2 күн мурун
Only a prediction exists in this matter. Not accurate information.
dutchrjen 2 күн мурун
"Now slices" are irrelevant. They do not say anything about the universe because we can ONLY see "now" in a single location. "Now slices" are just perception we have as a limited observer. We can map the entire universe onto a single preferred foliation perhaps that's the true "now." All except this one foliation could merely be perception. The universe could be a block or perhaps something else explains it. As an observer we are limited in what we have the ability to know.
Sylak 2 күн мурун
I'm more in the presentism view. Althought as a none physicist, my opinon on this is useless :-). But to me, if you wanted ( in your slice of universe/time) travel to the past, you will have to reconstruct every single, smallest unit of reality to the quantum states there where in at the moment you wish to travel. Because it doesn't exist anymore. and since the furtur doesn't exist, you can't go to it, you could "build" it maybe. but changing every quantum states of a whole universe seem crazy. Since we know that GR and space/time are incomplete, I don,t think the whole worm hole to the past, exist. well not to the past of your slice/box of time, maybe to a difference point in time of a places where time flow slower of faster than your own "box". that exist at the same time as your present. all probably wrong, but I like the thought exercise, and whatever become real, I'll accept it from my physicist overlords.
ak11230 2 күн мурун
I did study about space and time is like V letter at some point space and time become unity . Nothing move expend no time ... Time stops.... After years of looking into times and space ? I know I don't know nothing .....Ak
ValenHawk 2 күн мурун
Would Entropy be the equivalent of the motor in the phonograph ?
Ronald V Ronca
Ronald V Ronca 2 күн мурун
More nonsense from the scientific community to further impress upon the laymen their superior intellect. Listen to this man, he is explaining a possibility while trying to sound profound....there are theories upon theories constantly being's all possibilities, probabilities, theory and guesses. Only in time will we find the answers....but then what if time doesn't exist, in that case why bother, without time there is nothing.
George Clinton
George Clinton 2 күн мурун
Do I understand correctly, that the present is the same to everyone, but the delay between the real present and our perception (which is to get the light travel to us from an event) causes that we don't agree on what's happened when? Or I didn't understand anything about this video?
Jesus Guevara
Jesus Guevara 2 күн мурун
Hey you guys are idiots time doesn't exist, time is just a concept that humans created in order measure how long something last. No other existence in the universe uses the measurement called time except humans.
Aaren Cordova
Aaren Cordova 2 күн мурун
Can't say how much I love this channel enough!
Jesse 2 күн мурун
The light cone arguments are comprehensible enough and it's relatively clear how they change each observer's *perception* of the universe, but they don't really eliminate the concept of the present - they just make it impossible to calculate as any observer constrained by light-speed. But as we can see in *all* the depictions, an observer unconstrained by light-speed can define the present quite easily - a discrete t-axis is still present, it's just not accessible to the inhabitants of the block universe as their own perceptions of time are indelibly altered by position and velocity within the block. One key indicator of something akin to a 'true present' is that there is never a possible light cone that lets me see another observer's future *before they do* . I can see other elements that will interact with them in the future before they perceive them, but I can NEVER see another observer's future - or my own - I can only see nearer or further into their past depending on our relative positions and velocities. Even the super-luminal traveler can't see *my* future - they can only travel into the image of my distant past and back. This absolute bulwark protecting the Future from exploration strongly suggests that there *is* a present, even if it's hard or impossible for those of us experiencing it to agree on exactly what it is.
David Barber
David Barber 2 күн мурун
Cultures think of time differently, unfortunately since colonizers control the world by force we generally think of time in the way THEY think of time ie Roman Thought
Allan 112358
Allan 112358 20 саат мурун
Nice ironic comment given your fondness for the Phoenician script and a Semitic gangster religion.
Sulanis 2 күн мурун
So Here's a question for you? Based on this Cone of light that we observe. Is it possible to Take a Satellite and put it at the 4 corners of the solar system and extend of Cone of Light? I know it would still take a long time to reach us at earth again, but its like taking a sneak peek? S -------------------------------> E
Raw Engineer
Raw Engineer 2 күн мурун
"But interpreted some ways" - i.e. made up for the benefit of sci-fi writers because that's all physics is for these days.
Tim Robb
Tim Robb 2 күн мурун
9:12 Instructions Unclear, stubbed my toe and caused a Big Bang. Sorry guys
Neil Williams
Neil Williams Күн мурун
It’s ok I’ll have it back soon leave it to me and a few pissed off entitys
Cid Sapient
Cid Sapient 2 күн мурун
lol every time someone talks about determinism and perception of time all i can think about is the one electron universe theory
Mark Pressley
Mark Pressley 2 күн мурун
The present is the superposition of the past and the future! :-)
GeoDen 2 күн мурун
The past HAS existed, the future WILL exist. However you look at it.
Mr. Orc
Mr. Orc 2 күн мурун
Not a perfect accent for all type of people to understand.
last name first name
last name first name 3 күн мурун
My Ears hurt and my head hurts, I have 2 ouchees!
Neil Williams
Neil Williams Күн мурун
Me to b ok
Green Nights
Green Nights 3 күн мурун
So Much Universe, So Little Time. The current crisis in cosmology and how we got here. we got here relying on time, which only leads to more questions and dead ends.
tehdreamer 3 күн мурун
Jonas from Dark is now doing physics youtube channel
Hector Ganzon
Hector Ganzon 3 күн мурун
he got thin.
mark mac
mark mac 3 күн мурун
Yes it does because the now would never be.
Natas Diablo
Natas Diablo 3 күн мурун
Jaykee the Wolf: past, present, future do not exist. Luis: ?? Jaykee the Wolf: Without consciousness. Luis: genius. you deserve a beer for that one!
Fabien Vidal
Fabien Vidal 3 күн мурун
There is something wich I find unconvincing in the definition of the present being your light cone. Would "simultaneity" be restored, if the definition of the present was "the state of every object in the universe when the time taken by light to reach your present position equals light speed / distance" ?
agc 3 күн мурун
The problem with this, I would assume, is the term "distance." The distance between your present position and every other object in the universe, is constantly changing with time. So in order to judge your "now" with every other "now", you would need to take into account many future and past moments too that are crucial factors in just how long it takes light to reach you from those "nows." So in that sense, you can't talk about "simultaneity" and "now" in a vacuum, because to do so, you need to speak in terms of hypothetical light rays to traversing distances that are fluctuating and affected by NON-simultaneous events. If the measurement of your simultaneous event is dependent upon events that are non-simultaneous, I think that raises a huge problem. Basically the fact that light is not instantaneous, rules out the possibility of a single "now" in the universal sense. Perhaps you could define a logically consistent convoluted definition of "now", but from a universal perspective and physical perspective, it would have no actual meaning in reality.
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