Carl Sagan explains how Eratosthenes used shadows and simple math to prove the Earth isn’t flat—over 2,000 years ago!

There’s nowhere quite like Athens. The mix of ancient ruins and modern city life is pretty surreal, and the juxtaposition of a 2500-year-old temple with a corner restaurant serving authentic local ...

Sacred geometry found in ancient Greek temples is grounded on the idea that the world is created based on a consistent ...