Where does the extra space come from as the universe expands? and if it’s just stretching, does that mean it somehow is getting thinned out?
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As a biologist, I enjoy the resulting schadenfreude of questioners asking physicists basic fundamental physics questions on Reddit. Zero agreement. LOL.
“Can we define space-time?”
“Yes!” MIT engineers.
“No!” Harvard physicists.
Fight!
Lol.
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