My bad, I meant Pythagoras wasn't ever mentioned in books until the 1980s. Ertosthenis' experiment didn't prove anything though. I've never in my life seen parallel sun rays so idk how his stick shadow experiment proved anything except sun rays come in at different angles depending on your location relative to the sun's position in the sky.
My bad, I meant Pythagoras wasn't ever mentioned in books until the 1980s. Ertosthenis' experiment didn't prove anything though. I've never in my life seen parallel sun rays so idk how his stick shadow experiment proved anything except sun rays come in at different angles depending on your location relative to the sun's position in the sky.