00:00The time is just a tour of prestigitation.
00:03Ah yes, we are used to what the time feels like a car,
00:07always turning towards the future.
00:09It creates causes and effects,
00:11aligns the events after the other, like the dominos.
00:14Sometimes, it gets so long that we feel like it will stop.
00:19It is focused on the present moment,
00:22because it is the only one who really counts.
00:24But there is a new theory.
00:26It could be that it doesn't exist at all.
00:32We generally think that space has three dimensions.
00:36The top and the bottom, the left and the left, the left and the left, the left and the right.
00:40And everyone thought that time was something apart,
00:43just a universe clock that makes a tick-tack in the rear-plan,
00:46and which is the same for everyone.
00:48Then Einstein appeared.
00:50He decided to surprise people in 1905
00:53in introducing his theory of relativity.
00:56According to this theory,
00:58the time is also a dimension,
01:00at the same level as the others,
01:02and they are all linked in a single and same space-temps.
01:05On this basis,
01:06it appears that the time can change depending on the speed
01:09of which you move.
01:11Imagine now two jumeaux.
01:13The jumeaux A remains on Earth.
01:15The jumeaux B part in space
01:17at the board of a space space,
01:19which is moving at a speed
01:20close to the speed of the light.
01:22Let's say 90% of the speed of the light.
01:25The jumeaux B voyage to a star,
01:27then returns on Earth.
01:29For the jumeaux B,
01:31the journey seems to have only a few years.
01:33But when he returns on Earth,
01:34it appears that the jumeaux A
01:36has much more grown.
01:37He finds that 20,
01:3930,
01:39even more,
01:40the time changes on Earth.
01:41All this is due to a phenomenon called
01:43the temporation.
01:45This phenomenon is produced
01:46when we reach the temperatures
01:48close to the light,
01:50which has for effect
01:51to ralentir the time for the voyageur
01:53compared to someone
01:55who stays at the same place.
01:5810 years later,
02:00Einstein proposed his theory
02:01of the general relativity.
02:03It is then that we have learned
02:04that the time changes
02:05not only in terms of our speed,
02:08but also in terms of gravity.
02:09At the time,
02:11Newton thought that gravity
02:12was a magic force
02:13that made the objects
02:15be attracted to each other.
02:16But according to the theory
02:17Einstein,
02:18it is not a force,
02:19but rather a secondary effect.
02:21Imagine the space
02:22as a huge piece of tissue.
02:24When you throw a heavy ball
02:26on a tissue,
02:27it is curved.
02:28Now,
02:29if you throw small balls
02:30all around,
02:31they will naturally approach
02:32the heavy ball.
02:35In the same way,
02:37the massive objects
02:37such as the stars
02:38and the planets
02:39make them
02:40curve the space-temps
02:41around them.
02:42When an object
02:43very lourd
02:43is found in the space-temps,
02:45the matter
02:45curve around him.
02:47This curve
02:48indicates the objects
02:49how they should move.
02:50It is what we call
02:52the gravity.
02:53This idea
02:54has given place
02:54to all sorts
02:55of interesting predictions
02:57which have appeared
02:58exactes
02:58by the next.
03:00Curbures of the light
03:00under the effect
03:01of gravity.
03:02Trous noirs
03:03and dilation
03:04of the time
03:04around these black holes,
03:06like in the film
03:07Interstellar.
03:08This theory
03:09has revolutionized
03:10our vision of things.
03:11But we are perhaps
03:12at the end of
03:13another revolution.
03:16Some philosophers
03:17have a folly idea.
03:19They affirm
03:19that the things
03:20that we believe
03:20about the time
03:21are only ideas
03:22in our head
03:23and not the facts
03:24of the world.
03:25This idea,
03:26which rom with the tradition
03:27of time,
03:28is called
03:29Universe Bloch.
03:30It depends on the theory
03:31of the relativity
03:32of Einstein,
03:33but in the prolonging
03:34and complicated.
03:35Imagine the universe
03:36as an enormous sandwich.
03:38This sandwich
03:39contains all the moments
03:40of the time,
03:40the past,
03:41the present and the future,
03:42in the same time.
03:43Each couche
03:44or tranche
03:44of the sandwich
03:45represents a different moment
03:46in the time.
03:47And all these couches
03:48exist simultaneously
03:49and not the ones
03:50after the others.
03:52In this model
03:52of our world,
03:54the past,
03:54the present and the future
03:55are all egos.
03:57Contrairement
03:57to our everyday experience
03:59where the past
03:59doesn't exist anymore,
04:00where the future
04:01has not yet existed,
04:02and where only the present
04:03is real,
04:04the Universe Bloch
04:05says that each point
04:06in the time
04:07is as real as any other point.
04:09Imagine.
04:10Your birth
04:11and the past
04:12and the present
04:12and what you will do
04:13in 10 years
04:15exist all together
04:16in this block.
04:17According to this theory,
04:19there is no really
04:19flux temporel.
04:20We are used to
04:21how the time
04:22passes from one moment
04:23to another,
04:23even with the theory
04:24of Einstein.
04:25But in the Universe Bloch,
04:27the impression
04:27that the time passes
04:28takes more
04:29to the way we live
04:30the events
04:31and we don't remember
04:32the way the time
04:33works.
04:34It's like reading
04:35a magic book,
04:36all the pages exist
04:38at the same time.
04:38But you can't live
04:39the story
04:40that page by page.
04:43This means
04:44things terrifying
04:45like the destiny
04:46and the question
04:47of knowing
04:47if the free-arbitre
04:49exists really.
04:50If everything is already
04:51planned,
04:51what we do
04:52is important?
04:54For example,
04:55the fact that you had
04:56clicked on this video
04:57was already
04:57determined
04:58in the Universe Bloch.
04:59Every choice
05:00that you never made
05:01was an illusion.
05:03You are only a program
05:04who follows a code
05:05but who is capable
05:06of understanding
05:07the consequences.
05:08This would explain
05:09why we command
05:10the bad food
05:11at midnight,
05:11while knowing
05:12that it's a bad idea
05:13and that we're going
05:14to bite our fingers.
05:16But some scientists
05:17affirm that the
05:18evolution and the direction
05:19of the time
05:19are no longer
05:21real,
05:21because the cause
05:22and the facts exist
05:23well.
05:24If your birth,
05:26your present moment
05:26and your future
05:27all existed in the same time,
05:30you would be able
05:31to visit your past
05:32at any moment
05:33and already know
05:34what your future looks like.
05:36It could be so that
05:37all this debate
05:38is simply
05:38on the way
05:40we reconstitute
05:41our past stories
05:42and not on the
05:43impossible
05:43that the future
05:44is already done.
05:47There is also
05:48a battle
05:48without the end
05:49between the general
05:50and the quantum mechanics
05:52which makes
05:53that we add
05:53to the salt
05:54to the debate.
05:55One side,
05:56the general
05:57plays with the time
05:58as if it was
05:59a pattern
06:00extensive
06:01the time
06:02the time
06:02can be
06:02pulled out
06:03depending on the speed
06:05or gravity.
06:06In other words,
06:07in quantum mechanics
06:08the time
06:09is not something
06:10that can be manipulated
06:11or modified.
06:12It is a permanent scene
06:13on which
06:14the particles
06:15and the forces
06:16of the universe
06:17These two domains
06:18have been faced
06:18for long
06:19and scientists
06:20try to reunify them
06:21in a coherent theory
06:22of everything
06:23that exists.
06:24Some even try
06:25to fusion them
06:26in a logical way
06:27like the theory
06:28of the chord
06:28The theory
06:30of the chord
06:30can seem
06:31terrifying
06:31but it is simply
06:32that the entire universe
06:33with all its particles
06:35and all its atoms
06:36is made of
06:37very tense
06:39every chord
06:40can vibrate
06:41different ways
06:42like the chord
06:43of a guitar
06:43and in many dimensions.
06:45The way
06:46these chords vibrate
06:47determine the type
06:48of particles
06:49they will form
06:50like an electron
06:51or a quark.
06:52Another theory
06:53called gravitation
06:54quantum mechanics
06:55affirmed
06:56that space
06:56and the time
06:57are made of
06:58minuscules
06:58boucles.
07:00Qu'il s'agisse
07:01de cordes
07:02ou de boucles
07:03elles seraient
07:03malheureusement
07:04si minuscules
07:05que nous ne disposons
07:06pas encore
07:06d'un equipment
07:07suffisamment puissant
07:08pour les observer.
07:09Par conséquent
07:10tant que nous
07:11n'aurons pas testé
07:12ces théories
07:12elles ne pourront
07:13pas être prouvées.
07:15Ce qui est intéressant
07:15c'est que ces deux idées
07:17n'ont pas vraiment besoin
07:18du temps pour expliquer
07:19le fonctionnement de l'univers.
07:20Nous considérons
07:21que des objets
07:22comme les tables
07:22et les chaises
07:23sont réels
07:24même si la physique
07:25ne les décrit pas directement.
07:27Nous disons qu'il
07:27émerge
07:28des minuscules particules
07:30qui composent l'univers.
07:31Mais le temps, lui,
07:33nous ne savons pas
07:34exactement de quoi
07:35il pourrait émerger.
07:36Quelle que soit la réponse,
07:38tout ira bien pour vous.
07:39S'il s'avère
07:40que le temps n'existe pas vraiment,
07:41vous pourriez vous dire
07:42que tout est inutile.
07:44Mais réfléchissez à ceci.
07:46Nous continuons
07:47à mener notre vie,
07:48à faire l'expérience
07:49de la causalité
07:50et à donner un sens
07:51à tout ce qui nous entoure.
07:52L'impression
07:53que nous avons bien choisi
07:54de commander
07:54de la malbouffe à minuit
07:55est extrêmement tenace.
07:57Alors,
07:58est-ce que le fait
07:59que tout puisse être
08:00prédéterminé
08:00a vraiment de l'importance ?
08:02Quoi qu'il en soit,
08:03nous nous sommes trompés
08:04sur de nombreuses choses
08:05que nous pensions certaines.
08:07À l'heure actuelle,
08:08la théorie
08:09de l'univers Bloch
08:09et notre conception
08:10classique du monde
08:11sont très éloignées
08:13l'une de l'autre.
08:13Mais avec le temps,
08:15et oui,
08:16nous finirons
08:16par connaître la vérité.
08:18de l'univers Bloch
08:19de l'univers
08:20de l'univers
08:20de l'univers
08:20de l'univers
08:20de l'univers
08:20de l'univers
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