The ancient Greeks sailed through Propontis (now known as the Sea of Marmora), to reach Pontos; what is the modern name for Pontos?
Pontus is a historical Greek designation for a region on the southern coast of the Black Sea, located in modern-day eastern Black Sea Region of Turkey.
Which Greek mathematician, from the 1st century BC, is best known for the theorem which bears his name and for leading a group who discovered square numbers and proposed that the earth was round, planets have an axis, and they travel around the sun?