For most of us, the idea of time travel is one confined solely to science fiction programmes and novels. For many physicists, however, time travel is a very real idea built into the fabric of the universe we live in.
In fact, many of today’s most prominent scientists believe that one day, humanity will be able to travel forward in time as easily as stepping on an airplane. Even Stephen Hawking believe it. Seems like time’s not quite as solid as your wristwatch would have you believe. As Doctor Who will tell you, time is “more like a big ball of wibbly wobbly, timey wimey… stuff.”
Why? Well, to explain that, we’ll have to start with everyone’s favourite genius: Albert Einstein. At the start of the 20th century, Einstein blew everyone’s minds with his ideas about how we should think about time and space.
Einstein suggested that we shouldn’t think of the two as two separate elements, but as one: spacetime. And if we can travel through space, then we should theoretically be able to travel through time. Time becomes an extra fourth dimension, one which anyone should be able to move through.
According to Einstein’s theories, if we could travel faster than the speed of light, then we would be able to travel forward in time. The problem with that, however, is that no one can figure out how to make a human go faster than the speed of light. That’s 186,282 miles per second, just in case you were wondering.
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