Time travel, with Lawrence Krauss
Instant Genius
00:00
The Physics of Star Trek: The Next Generation
There are lots of Star Trek episodes involving time travel. The one that struck me as an episode where this data, who's called the next generation goes back in time and discovers himself,. This skull or his head. And what's interesting about it is it demonstrates the problems with thinking about time travel. If time travel were possible, all of these classical notions about how things work would have to be changed.
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