Flat earth? I've noticed that younger people tend to be prone to these sorts of ideas. But because I've studied mathematics and physics, flat earth logic is a mental contortion that won't let my software work properly.

@stan has an excellent video on rocket science that pretty much proves to anyone willing not to stick their head in the flat earth, that the earth is not much different from Mars, Jupiter, the Moon, etc... We can see that they're round, why should the earth be any different given the universal laws apply the same everywhere?