Earth: 4.5 billion years old. It survived five mass extinctions, relies on a paper-thin atmosphere, and somehow produced us. It's an extraordinary place. But most of us know more about what's dropping ...

Add Yahoo as a preferred source to see more of our stories on Google. Yes, we've all been taught that the Earth is not flat, but it may shock you to learn that it's not perfectly spherical either. As ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...