Explain Like I'm Five | Don't Panic!

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ELI5: Why do we believe the universe has a beginning and why do we think the universe has a shape? (lemmit.online)

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The original was posted on /r/explainlikeimfive by /u/hopefully-not-so on 2023-06-25 03:34:13+00:00.

Is there any support that some parts of the universe just are, just exist, and from there the Big Bang happened (and so on)? Similarly, I read theories that the universe may be flat, spherical, or saddle shaped - with each having their own properties when it comes to being finite/infinite etc. I don’t understand how the universe could have a shape at all.

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