Time Travel: Hey, Grandpa

 

In the second episode of this two-part series, Robert and Allison check out the possibilities of travelling into the past. From wormholes to the grandfather paradox, there are many arguments for -- and against -- time travel. Tune in and learn more.

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Stuff To Blow Your Mind

Deep in the back of your mind, you’ve always had the feeling that there’s something strange about re… 

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