3FEL9
Islander
The universe is topologically flat ie parallel lines are nonintersecting/nondivergent on a global basis away from gravity concentrations.
Bur that isn't 2D.
So you stumbled over the consensus views on this..
Well. I'm not so sure. For all I know 4D is just curled up real tight into a manifold of higher dimensions.
So the globey Earth could be considered very flat looking from a different vantage point.
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