Asteroid collisions aren't always bad.

Many impact craters on Earth have been erased thanks to wind, water, and plate tectonics. But scientists have clever ways to find them.

The cycles of life all rely on the dynamism of the Earth’s crust.

The year 1893 was a big one for Eagle, Wisconsin. Workers found a huge diamond on the Devereaux farm: sixteen carats, uncut, and now, all these years later, missing.

Even one volcano can have impacts that affect the planet. There have been eruptions that affected the temperature over the entire hemisphere.

How Antarctica's "Blood Falls" were discovered.

Readings on the Paleoindian period.

The accomplishments of Mary Anning and other early female fossilists, geologists and natural historians