Sorry to burst your bubble, but the Greeks worked out the Earth was round more than 2000 years ago. Not only that, but they worked out the circumfrence of the globe to within a few miles.
You mean Eratosthenes of Cyrene, that old "fool" who believed in Zeus?
By his won inscription: "Happy art thou, Ptolemy, in that, as a father the equal of his son in youthful vigour, thou hast thyself given him all that is dear to muses and Kings, and may be in the future, O Zeus, god of heaven, also receive the sceptre at thy hands. Thus may it be, and let any one who sees this offering say 'This is the gift of Eratosthenes of Cyrene'."
Man. Anyone who invokes the name of a god must be a real "threat" to science.