Well, technically the Earth isn't flat, it's got mountains, valleys, and massive depths in the oceans.

I think a bigger what if question to ponder is, what if, what if the Earth is actually flat and we're below the firmament, as stated in Genesis mind you, what the H E double hockey sticks has NASA been doing with all that friggin money?!

Well, technically the Earth isn't flat, it's got mountains, valleys, and massive depths in the oceans.