To avoid global warming on a catastrophic scale, nations need to reduce emissions and find ways to pull carbon from the air. One promising solution: spreading rock dust on farm fields.

"...an evolution of the mantle of the Earth could control an evolution of the atmosphere of the Earth, and possibly an evolution of life."

"We found that in regions where weaker rocks are present, earthquakes may rupture faults under low friction."

Rockfalls on the moon leave their mark on the surface. A map of 136,610 rockfalls indicates that asteroid impacts are a likely cause.

"This is a 200-year old question. If we can solve that, we would definitely be rock stars."

Scientists braved the heat to answer a question about oxygen and "Snowball Earth," a period when the oceans virtually froze from the poles to the equator.

For 10 years, researchers have used sensors they installed on the Matterhorn mountain to watch for changes and natural hazards.

Lunar samples from the Apollo missions are still valuable to researchers studying the origins of the moon.

Scientists have debated what kept a long period of global cooling going 15 million years ago. New research may debunk a popular theory.

It has been extremely difficult to assign meteorites called mesosiderites to a specific asteroid. New research indicates their age and origin.