Earth Day is an opportunity to celebrate our planet and environment. Get your child in the spirit by sharing these fun facts ...

The planet is almost 25,000 miles around and 4.54 billion years old, and humans are still discovering some of the amazing ...

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 ...

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 ...

A college student in a gas mask "smells" a magnolia blossom during the first Earth Day on April 22, 1970 in New York City. More than 8 billion people inhabit our planet, and each year Earth Day ...

The ground below us seems so steady and also unvarying; however, the Earth is a chaotic, bustling work of art. It may have diminishing oceans, and its moon may be drifting at a snail's pace, but all ...