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Time travel's been one of man's wildest fantasies for centuries. It's long been a popular trend in movies and fiction,
A topic which Everyone wants to know
Travelling forwards in time is surprisingly easy. Einstein’s special theory of relativity,developed in 1905, shows that time passes at different rates for people who are moving relative to one another - although the effect only becomes large when you get close to the speed of light.
If one were to leave Earth in a spacecraft travelling at an appreciable fraction of lightspeed, turn around and come back, only a few years might have passed on board but many years could have gone by on Earth. This is known as the " twin paradox" ,
since a traveller undertaking such a journey would return to find herself much younger than her twin.
There’s only one problem from anyone wishing to get a glimpse of the future – getting back. It would mean travelling faster than light
and that’s not possible.
But there may be an out to be found in general relativity, Einstein’s theory of gravity that unites space and time as “spacetime”, which curves in the presence of mass. It allows for the possibility of wormhole
a kind of tunnel through spacetime connecting otherwise very distant parts of the universe.
If the “mouths” of the wormhole are moving relative to one another, then traversing the bridge between different points in space would also take a traveller to a different point in time to that in which she started.
However it would still be impossible to go back further in time than the point at which the wormhole was created, limiting the options for travel somewhat - and possibly explaining why we haven’t encountered any visitors from the future. If any natural wormholes were formed in the Big Bang, it might be possible to travel to a limited number of points in the past and in the distant universe, but wouldn’t enable one to flit around the cosmos at will as the Doctor seems to do.
Albert Einstein laid the groundwork for much of the theoretical science that governs most time travel research today.
As we about time travel very and what is time dilation
Time dilation basically refers to the idea that time passes more slowly for a moving clock than it does for a stationary clock. The force of gravity also affects the difference in elapsed time. The greater the gravity and the greater the velocity, the greater the difference in time.
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