饾槉饾槩饾槸 饾樀饾槳饾槷饾槮 饾樀饾槼饾槩饾樂饾槮饾槶 饾槮饾樂饾槮饾槼 饾槪饾槮 饾槺饾槹饾槾饾槾饾槳饾槪饾槶饾槮? - Deepstash
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Time TRAVEL- A One Way Ticket?

Time TRAVEL- A One Way Ticket?

To look at whether time travel is possible we need to distinguish between travelling back and travelling forwards. 鈥淔rom 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'.聽

鈥淭he more interesting idea is being able to access a future everyone else is travelling slowly towards. So you move forward without ageing. And that, in theory, is actually perfectly possible,鈥 he says.

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Going Forward In Time

Going Forward In Time

You may have heard of Cryogenics. This is when someone who鈥檚 died is frozen instead of being buried or cremated. The theory is they can be 鈥渨oken up鈥 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 than others around them. This way they鈥檇 live longer and see a future beyond the average person鈥檚 life span.聽

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Another method might involve travelling in a rocket/spaceship at a very high speed, close to the speed of light. 鈥淲e can鈥檛 establish equality with the speed of light but it is possible, in theory, to travel nearly as fast as the speed of light,鈥 adds Dr Steane.聽

So imagine you鈥檙e in a spaceship travelling very fast away from the Earth and you stay in orbit for a year. You'd age at the same rate as if you were still on the Earth, by a year, but when you returned, the earth may have aged hundreds of years. 鈥淭his is way beyond the technology we have at the moment, but in theory, it's possible.鈥澛

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Going Back?

Going Back?

So we may one day be able to time travel forwards but what about going back?

鈥淗ere we hit the philosophical problem that always comes up when you discuss travelling back in time,鈥 says Dr Steane. "Suppose you could go back in time and you accidentally killed your grandparents. Wouldn鈥檛 that mean you couldn鈥檛 exist either?"

So how could you go back in time and see people who鈥檝e died - some of them hundreds of years ago?

It's very complex.

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However, going back in time goes against the laws of physics- some processes are reversible and some irreversible.

Processes like an avalanche can鈥檛 unhappen. Likewise, on a smaller scale, if you drop an egg, you can鈥檛 unbreak it.

A spinning top or a pendulum, is reversible because it keeps moving, repeating itself. Nothing really happens. 鈥淲ithin physics, we鈥檙e very aware of these issues. The world is irreversible. And so are our lives. We grow, we age, we die,鈥 says Dr Steane.

You can鈥檛 reverse the effects of a catastrophic event. And that鈥檚 why going back in time is not likely to be possible.

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Your Very Own Time Travel

Your Very Own Time Travel

If you鈥檙e feeling disappointed that we can鈥檛 literally travel back in time then remember there鈥檚 nowhere you can鈥檛 go in your own mind.

Think about history lessons where you鈥檙e asked to imagine yourself in someone else鈥檚 shoes from long ago or when you look at old photos of fun times. That鈥檚 time travel. And what about when you read a book or listen to a聽story told by a grandparent?

You can transport yourself to anywhere back in time and the beauty is you can come back. Since isn鈥檛 the greatest fear of time travelling getting stuck in a different time zone and never being able to return?

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鈥滒潙火潚夝潚 饾拲饾拪饾拠饾拞 饾拹饾拠 饾挄饾拤饾拪饾挃 饾挊饾拹饾挀饾拲饾拝 饾拪饾挃 饾拵饾拞饾挀饾拞饾拲饾挌 饾拞饾拸饾拫饾拹饾挌饾拵饾拞饾拸饾挄 饾拹饾拠 饾拝饾拞饾拲饾挅饾挃饾拪饾拹饾拸.鈥 饾懜饾挅饾挀饾拏饾拸 3:185

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