An earlier universe can still be observed today, says Roger Penrose

Re:An earlier universe can still be observed today, says Rog... by sillysaurusx on Wednesday October 07, 2020 @06:46PM (#24713705)

I like your reasoning. Feynman pointed out why this doesn’t work: you have to “borrow odd”, so to speak, in order to get any effect. Which means that your slight perturbation, although miraculous, ends up having little more than an infinitesimal effect over an even smaller amount of time.

Feynman put it way better than me though. It was in the Messenger Lectures series if you’re curious. 6 wonderful and accessible videos; his audience was primarily laypeople, not scientists. Quite enjoyable.

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Re:An earlier universe can still be observed today, says Rog... by Analog24 on Wednesday October 07, 2020 @09:47PM (#24714818)

Feynman's argument was about why you can't have systems that decrease entropy continuously. It doesn't disprove that there can (and will) be downward fluctuations in entropy, which is what I believe the OP was asking about. As someone else mentioned this is the idea behind a Boltzmann Brain (which is a pretty fascinating concept).

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