Eli5 If the universe expanded from a single point why do scientists say its flat and not spherical?

Question

Why would it only expand in one plane not every direction like you’d expect?

Also how is a flat universe even possible? Surely since we live in 3 dimensions the universe needs to be a 3 dimensional shape.

Im probably misunderstanding what physicists are trying to say but that’s why im here.

In: 229

Answer 1

Sabine talks about a bubble of galaxies in this one which might help a little
[https://youtu.be/bgKiMokFr3o?si=Zsf-x8b2AfWABVYx](https://youtu.be/bgKiMokFr3o?si=Zsf-x8b2AfWABVYx)