Add Yahoo as a preferred source to see more of our stories on Google. Get excited about Earth Day with these interesting facts about the world. Traveling to new places always expands the mind, but ...

Did you know that our planet is rocketing around the sun at 67,000 mph? Or that it once had two moons? Here are some amazing facts about Earth.

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 ...