Some on this thread are just cynics with closed minds.
What is needed is cold hard science. I've conducted an experiment under VERY scientific conditions, and let's see the results.
I attempted to balance a small spherical object on top of a larger sphere. The result?
It rolled off.
Then, ingeniously, I scaled-up the experiment. I balanced a much larger spherical object (a footy) on top of another supposedly spherical object (The Earth) and left it overnight. The result?
It's not rolled anywhere.
People of cycle chat, conclusive SCIENTIFICALLY PROVEN FACT, the earth is flat.