In Time for Andrew, Drew lives in the year 1996 and Andrew lives in the year 1910. When Drew finds a bag of marbles that once belonged to Andrew, it opens a door to the past allowing the boys who looked identical to change places in time.
Many scientists have been trying to figure out if time travel is possible and if it works. One of the scientists who discovered it was at least possible was Albert Einstein. He let off a theory about time travel.
His theory was this, quoted by Albert Einstein "The relativistic analogy can be carried to its logical end. Since time begins to slow down with higher speeds, it can be shown that at the speed of light it stops totally and beyond that it begins to run backwards! Similarly, matter having contracted more and more, ultimately vanishes. But beyond the speed of light it is difficult to imagine negative matter with infinite mass."
Albert Einstein is mainly saying that the faster you go, the slower time goes. Once you start going the speed of light time stops and when you go faster than the speed the speed of light time actually starts to run backwards.
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