Zenode said:
Well that is really quite an infuriating post by the Reverend, even if it is satire, because somewhere in the world there is someone who is crazy/stupid/devout enough to consider it true.
But this is about proving it wrong, and I have not only a simple but ancient method of proving the Earth's spherical nature.
When you look at a ship coming over the horizon (hint) you will at first only see the crow's nest, then the sail, then finally the main hull of the ship. If the world was flat, then you would see all of the ship all the time, and not only that, but on a clear day you would be able to see the port they came from if it was in line of sight.
But you can't, hence the world is round.