So we may one day be able to time travel forwards but what about going back?
“Here we hit the philosophical problem that always comes up when you discuss travelling back in time,” says Dr Steane. "Suppose you could go back in time and you accidentally killed your grandparents. Wouldn’t that mean you couldn’t exist either?"
So how could you go back in time and see people who’ve died - some of them hundreds of years ago?
It's very complex.
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If you’re feeling disappointed that we can’t literally travel back in time then remember there’s nowhere you can’t go in your own mind.
Think about history lessons where you’re asked to imagine yourself in someone else’s shoes from long ago or when you look at old photos of fun times. That’...
You may have heard of Cryogenics. This is when someone who’s died is frozen instead of being buried or cremated. The theory is they can be “woken up” in the future when we have the technology to bring them back to life. Or a machine or device could be developed so that some people age more slowly...
To look at whether time travel is possible we need to distinguish between travelling back and travelling forwards. “From a philosophical point of view, we are constantly time travelling! As we age in our ordinary everyday lives, we are forever travelling into the future'.
“The more interes...
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