Do you recall what Carl Sagan wrote, regarding the possibility of the end of Time?

  • Thread starter Thread starter Polonius☆
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Polonius☆

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From my memory, it went something like this…
You throw a pebble in a pond and observe the ripples.
If there is enough matter in the universe it would gravitationally reverse the expansion and this is the interesting part..
Cause would precede events. I.e. you observe the ripples and the stone comes back in your hand.

I was wondering if scientists currently still believe it possible that time would reverse.
 
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