AM does not read like he would ever be convinced to "see the light" (at least until he passes) -- his cockeyed ideas are etched in stone from constant brainwashing, either by reading the anti-evolution blogs or by clergy. Actually, my experience with many clerics is much more pliable towards evolution and they've reconciled it with their religious beliefs (well, I do live in California!). One can disagree that that isn't possible but it is, after all, their right. One has the right to be inquisitive, imaginative, logical, skeptical and reasonable and also the right to be fooled, misinformed, intimidated, and ignorant (actually committing to it in writing). No scientist or science advocate has ever burned the uninformed at the stake. Can't state the same for vice versa.
Eratosthenes was the Greek who performed the mathematical calculations confirming that the Earth's surface was curved and calculated the size of the globe. He was in Alexandria when he made his observations using stades (an unknown measure today) and the position of the Sun overhead but it's been established that he was within 5 to 10% correct. Predating his discovery was Aristotle who was convinced of a spherical Earth in his philosophy and Pythagoras who advocated that observable celestial bodies are all spherical. It is likely that the Mesopotamians who originated the idea of a flat circular Earth (a direct correlation to the Bible's "circle") was partly based on observing the Moon which, of course, does not revolve and looks like a flat cut-out in the sky.
Earlier than Eratosthenes, Egyptian astronomers performed an experiment by placing stanchions at calculated intervals in line with the path of the sun at Summer solstice and observing that the shadow of each pole was a different length. They concluded that the Earth's surface was curved and also performed calculations of the circumference, however, the historical proof is scant and was likely burned in the Library of Alexandria fire. It's in three volumes of Egyptology I have from college textbooks and my personal library purchases since so I'm going by memory and would have to look it up. One of the volumes, or on the video, of Carl Sagan's "Cosmos," there is a recreation of the experiment. Can't seem to find it through Google, but on my first tries, the algorithms were coming up with thousands of matches and I'll have to figure out what words to enter to narrow it down.
But, then, ancient Muslim, Indian and Chinese astronomers also came up with the concept of a spherical Earth. I'm guessing that some must believe the writers (that's stenographers, you know) of the Bible were all in contact with all of them.