3. 25 Facts About Geologic Time That Made Our Brains Hurt 4. How Do We Know? A Glimpse into Geologic Sleuthing 5. Our ...

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 ...

If you look back through the billions of years of Earth’s history, you realize that the ground beneath you is anything but stable. Our planet has been a molten ball of fire, a frozen wasteland, and a ...

For Earth Day on April 22, interesting facts including who invented it, why it's on that date, and how it turned into a ...