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 ...

Add Yahoo as a preferred source to see more of our stories on Google. This year marks the 55th anniversary of Earth Day! Every year on April 22, people worldwide mobilize to address some of the most ...

History teachers love making everything sound clean and simple. "This happened, then that happened, everyone learned a lesson, the end." Yeah, that's garbage. The Mongols, for example, managed to ...

EARTH (MEDIA GENERAL) – In honor of Earth Day today, here are five interesting facts about “the blue marble.” It’s all in the name Earth is the only planet in our solar system not named for a Roman ...

Today I'm bringing you 25 facts about geologic time that made our brains hurt — starting with the one that makes it clear we only just got here. Grab your copy of What The Facts now, available on ...