Thursday, July 6, 2023

Time isn't a constant...

 ...to our brains. And it's not a constant in the universe either. Turns out that right after the Big Bang, time ran about five times more slowly than it does now. We know this from observing quasars, which are basically cosmic clocks.

Of course, to an observer, time would have been the same as it now. (The reason we observe different speeds of time has to do with our brain making memories, that's why the outgoing trip to a place you have never been to takes longer than the return trip and why time runs slower for children).

It's just another confirmation that Einstein was right.

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