The question "How many continents are there on Earth?" might seem simple, but when you delve into it, the answer becomes much ...

The concepts of continents have confused people from their very beginning. Today I try to see if I can do any better at dividing the world up into manageable units.

The world’s oldest map of the night sky was amazingly accurate. Newly discovered fragments of 2,200-year-old star coordinates—once thought lost—reveal the incredible skill of the ancient ...