Is Time Travel ACTUALLY Possible?

have you ever dreamt of traveling

through time I'm sure we all have maybe

you want to go back to the past to see

how things were were even change

something or would you prefer to go into

the future to see how things turn out

time travel is a mainstay of science

fiction with books and movies imagining

the benefits and risks of such an

ability but is time travel actually

possible and if so what do we need to be

able to do it to understand how we might

go about traveling through time we must

first understand what time is classical

physics saw the concept of time as

something that exists for everyone

everywhere in the universe it's

independent of any who perceive it and

progresses at the same pace for everyone

it means that a cause is always followed

by an effect never the other way around

something that the structure of the

universe relies upon the problem with

this understanding of time though is

that it doesn't hold true in all

circumstances that is why Einstein

theory of relativity is seen as one of

the most important scientific

breakthroughs ever because it explains

the changing nature of time the theory

of relativity sees time as one element

of four-dimensional space-time and can

be influenced by other factors objects

moving at high speed for example

experienced hunch slower than those

moving with less velocity and there's a

similar effect for objects held within

gravitational fields on a human level

this means that an astronaut orbiting

the Earth will age slower than those of

us that remain on the planet but there

are far more unexpected consequences of

this take black holes for example they

assert the greatest gravitational poles

of any no object in the universe they

are so strong that light itself cannot

escape and also causes time to slow down

to an extreme level if you were to say

poor Matthew McConaughey and fall into a

black hole while looking out into the

rest of the universe you would in theory

witness hundreds of millions of years

worth of events before ultimately

succumbing to your inevitable fate or

get trapped behind some bookshelves if

it were even possible to escape a black

hole so much time would have

on the outside that life would be

completely unrecognizable another cork

of time occurs with the speed of light

as you get faster and faster time slows

down for you and this continues until

you reach the theoretical maximum speed

that anything can reach the speed of

light

at this speed time has slowed to such an

extent that things seemingly happen

instantaneously imagine for example a

photon of light that is emitted by a

star on the other side of the universe

it will take even at its incredible

speed many millions of years to reach us

on earth and be seen by our eyes as a

twinkle in the sky for the Fulton though

the journey is instantaneous it is

created and then it reached us in the

same instant when traveling at the speed

of light time is neutral it travels

neither Ford War backward so if the

faster you go the slower time appears

for you compared to everything else then

this is a potential route to traveling

forward in time you could speed away

from Earth and return and many years

will pass without you getting much older

the really difficult part of course is

going backwards in time if at the speed

of light time is stagnant then does that

mean if you were to travel faster than

the speed of light then would I work in

Reverse many researchers think so and

there is a theory that there is actually

a subatomic particle that does exactly

this known as a tachyon these particles

are theoretical and have never actually

been observed partly because if the

theory is true you would never be able

to see them coming towards you as this

event would be occurring in the future

the ideas of cause and effect would work

in reverse for tachyons but there are

those that believe that harnessing them

could be the best route to learning how

to travel through time another theory is

that of wormholes these act as tunnels

through the fabric of space-time and

could create a path between any two

places at any given time the theory of

relativity actually allows for wormholes

to exist but stay stadi energy levels

required to create one would be

astronomical and could result in the

formation of a black hole

Stephen Hawking believed that the

radiation feedback which works in a

similar way to the feedback of sound

that would

make wormholes inherently unstable and

unable to last long of time to be used

as a time machine other researchers have

suggested a number of ways in which

space-time could be harnessed to allow

time travel perhaps lasers could be used

to create extreme levels of gravity

quantum physics may allow for the

formation of a so-called quantum tunnel

between universes and perhaps a string

theory might lead to revelations of how

cosmic strings and black holes could

enter wine to warp space-time enough to

travel back through time in conclusion

the notion of time travel has long been

of interest to researchers in all of us

at some point or another and for a long

time it will start to be completely

impossible with advances in our

understanding about the universe in the

last century it's no longer seen as

completely impossible but it's still an

ability that lies well beyond our

current capabilities the law of physics

to allow for it to happen and it could

very well in the future be something

that becomes more of a fact than fiction

but let me know what you guys think do

you believe time travel has already been

invented in there are now time travelers

Omanis thank you all so much for

watching

see you next time