[verga]

Unless you know of some four cornered sphere, the Bible says the earth is flat.

There is a 3 dimensional object that does have 4 corners. It is generally 4 triangular shapes in the form of a pyramid. You have a triangular base and 3 triangular sides.

You can see them at gaming stores as 4 sided die.

[null and void]

So we live on a tetrahedron? I think not!