Time travel, with Lawrence Krauss
Instant Genius
00:00
The Paradox of Time Travel
There are many arguments for why time travel is impossible in a rational universe. The grandfather paradox, well, the Grandmother paradox,. And so it's all of these major issues that if you go back in time, you change the future. There are other possibilities too. I mean, most people want to go back intime to either correct the errors of their youth or relive them depending upon their mood.
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