All language subtitles for What If You Could Access the FOURTH Dimension Interstellar explained.en

This is Murphy's bedroom

while she was a little kid.

And here it is 25 years later

in the same bedroom.

Between the two timelines, there is still

a strong anomalous force at work.

It is sent from another space-time dimension

by her father.

What if i told you that the message

her father sent was only a few minutes

apart from the other?

So what exactly is it?

And why is the space within it

shown in this way?

Ultimately, how can this chamber

becomes like a time machine?

Today we're going to explore just that

and #Beeyond

The initial question to be asked here is

how Cooper got into the tesseract

in the first place.

From the film, we know that it is because

he intends to enlighten the endurance load

so that Dr. Brandt can reach Edmund's planet.

So he flings himself and goes directly

into the black hole Gargantua.

But you might be asking:

"How could you enter a black hole

and emerge alive at the other end?"

You may have heard that when someone

is pulled into a black hole

their body could be stretched to

the size of a spaghetti strand.

In addition, if you approach the black hole

on a normal, perpendicular trajectory

your body will split into 2, 4, 8, 16, etc.

However, because the film indicates that

this is a spinning black hole

this phenomenon does not occur.

And in principle, you should be able to

escape the bifurcation of your body

by following a specific trajectory.

Now as we are falling towards

the black hole, time for us is gonna flow

more slowly than the rest of the universe.

And once Cooper is inside

time is gonna stop flowing for him

according to an outside observer.

First and foremost, we must state

the obvious.

The science of interstellar encompasses

all four areas of physics.

Newtonian, relativistic, quantum

and quantum gravity.

In our current understanding of

quantum gravity, our universe is a membrane

or as physicists would like to call it a "brane".

This is the place where you, I and

everything else that exist or

have existed, lay.

This brane resides in hyperspace

which is a higher dimensional space.

And at this point in time this notion

falls within the educated guesses.

This is what the warped brane would

look like, if viewed from a hyperspace.

In reality, black holes are formed of

warped space and warped time

which are made of components from

the same brane that we're familiar with.

As a result, the idea that the singularity

leads to a portal, which would then enable

access to hyperspace is purely speculative.

But we're not done yet.

Let's pretend that it may happen

for the sake of the movie.

Through this black hole, Cooper escapes

our universe brane

and use it as a bridge into hyperspace.

Essentially allowing him to enter the "Tesseract".

A region of space-time that extends

from the singularity of the black hole

into hyperspace.

If you don't want to hear the nerdy details

of this tesseract, just skip to the next chapter.

But, if you decide to follow along

here we go.

First of all, the back face of the tesseract

corresponds with Murphy's bedroom.

So everything in her bedroom,

including herself is somehow inside

the tesseract's back face.

And one particular moment in time

could be observed in six different viewing angles.

It might come from above, while also

on the right side simultaneously.

The second thing, we see that the bedroom

has extrusions all around the tesseract

with two directions transfers to

Cooper's chamber.

Let's look at a specific example

to understand this better.

Cross sections through the room that

are vertical here, travel upward with

the passage of time.

With the same notion, the cross sections

that are horizontal travel rightward

as time passes.

Essentially, this cross section depicts

a different viewing angle of Murph's bedroom.

Where the two extrusions intersect

there is a moment in the bedroom

that you could observe its current present.

An actual moment of time.

This is where the movie defines it as

"While extrusions are extending

time is flowing along them"

Cooper has the ability to travel faster than

the flow of time in the extrusions

allowing him to explore the tesseract complex.

In summary, this weird psychedelic vortex

was merely our normal space-time.

But with one temporal dimension, or time

manifested as an accessible spatial dimension.

In this chamber, Cooper could simply go

forward and backward in time

as simple as moving diagonally

up and down through the tesseract complex.

However, there's still one missing puzzle

that we need to explore deeper.

To have a better understanding of

this tesseract.

Along the way, we could start asking

the question of

"What happens if you could access

a higher, hypothetical

four-dimensional hypercube?

Wouldn't that imply that we'd have

access to something that we wouldn't

normally have access to?

Let me give you an analogy.

Do you know that there is just

a small portion of the internet

accessible through the open web

in contrast to the deep web.

Like for instance, if you live in Asia

but want to access the educational databases

that are only available in European universities.

You can't simply do that because of GDPR.

If you go to the deep web of the same

portal page in a European city

then you may be able to access it.

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"How could you access that hidden layer

when you're bound by the three spatial

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It is noted from the movie that

the physical objects and fields having

three spatial dimensions

such as humans, light and information

cannot move backward in time

from one point in our brane to another.

Just like the information about Murph in the past

can go to Cooper in the tesseract in the future.

But it cannot travel back in time from Cooper

to younger Murph.

This is due to the fact that the actual warping

of space-time prevents it.

Cooper, in particular, will never be able to

return back in time and alter anything.

However as we see in the movie

gravitational forces may carry messages

into the past.

The signals can travel back in time

from Cooper to Murph

overcoming the one-way barrier.

That's why since the beginning

this movie talks about gravity anomalies.

Professor Brandt was only able to partially

solve this formulation, with half of the answer

being located within the black hole.

If this equation holds true in real life

I'm guessing this is some sort of a

boundary-layer problem.

Remember how in university level math

you had to solve a partial differential equation

that required a few boundary layers

for the solutions to be established.

Cooper sends quantum data from

the black hole to Murph, indicating that

the solution has been found.

It's becoming clearer now.

Cooper's existence in the tesseract appears

to serve a purpose.

Or to put it another way. his mission is

predetermined.

We can say this because as soon as

the quantum of data is securely in Murphy's hand

Cooper's mission is finished.

The tesseract that has been transporting him

across hyperspace is beginning to close.

Also, looking from another point of view

why is it that the tesseract only features

Murphy's bedroom?

Out of all the places in the universe

why does it have to be that specific bedroom?

Isn't it obvious that she's been predestined

to solve the equation?

This is the point at which this movie

is supposed to hit you.

Cooper across the tesseract sends that

NASA's coordinate to younger Murph.

They then proceed to the location

where cooper is briefed about the secret mission.

He leaves earth and travels to a wormhole.

Regrettably, he falls into a black hole and

finds himself in the tesseract.

Finally, he sends the quantum data

to older Murph.

The entire chain of events is one-big

predetermined loop.

The timeline is there, since the beginning.

If you think about it, what makes the adult Murph

return to the bedroom?

Her gut feeling tells her that going back

to the childhood room is going to help her

solve the gravity equation.

But was it all fate?

This of course begs the notion of

free will in her action.

Was it really her, who made the

split-second decision?

Or was it all part of an extricable

chain of events, in which

whatever happens must always happen

precisely as it is depicted.

So you're mistaken, if you assume

you could modify something in a timeline

that has already been laid out.

I believe the Novikov's self-consistency principle

underpins the concept of time travel

in Interstellar.

It says that..

"There's just one self-consistent chronology

with no branching of timelines

and no capacity to alter the past"

At the end, we discovered that there's no

definite start point for the loop.

It has been continuing ever since creation

and will continue to do so till the universe

comes to an end.

Every time Cooper appears in the tesseract

he performs the same thing.

By encoding the information in the watch

and assisting Murph in solving the equation.

Special thanks to the beloved members!