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

Explore 25 awesome facts about the most extreme things on Earth, from the hottest deserts to the deepest oceans. Uncover ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

A college student in a gas mask "smells" a magnolia blossom during the first Earth Day on April 22, 1970 in New York City. Credit - AP More than 8 billion people inhabit Earth, and soon a springtime ...

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 ...

Often when we're presented with facts about the environment, the numbers used can be so astronomically high, and the language so confusingly jargon-ish, that its tough for the average reader to care ...