Can anyone bring me proofs from the Gemara that proves the world was round-and that this was known 2000+ years ago?
I have looked around and I can't seem to find any sources which prove this.
See Gemara and Tosfos Avoda Zara (41a K'Kadur)
shetofes es atzmo tachas kol haolam kulo k'kadur
"shetofes es atzmo tachas kol haolam kulo k'kadur"
Tosfos says "Because the World is round"
Tosfos references a Yerushalmi which echoes this point: "Alexander the Macedonian ascended on high until he saw the earth like a ball and the sea like a platter. The 'sea' refers to the ocean that encompasses the entire earth"
Also see the Yaavet'z on this Tosfos in the back of the gemara