Unusual hydrogen signatures in volcanic rocks may come from Earth’s core. Simulations suggest ancient magma crystallization ...

A battle of forces, driven by the motion of Earth’s core, can explain small variations in the planet’s rotation, study finds.

Earth’s core has been holding onto materials from the planet’s earliest days for roughly 4.5 billion years. Now, scientists ...

The mantle, a rocky layer accounting for more than 80% of Earth's volume, circulates at rates of only a few centimeters per year. This circulation drives plate tectonics and influences major ...

When Earth formed billions of years ago, its metallic core was wrapped in a global ocean of molten rock, which eventually ...

A new study suggests ancient hydrogen trapped deep inside Earth has been slowly escaping into the mantle for billions of ...

Far below your feet, nearly 1,800 miles beneath oceans and continents, Earth carries two massive scars from its violent youth. They are so large they rival continents in size, yet no human will ever ...

When Earth first formed, around 4.5 billion years ago, it was an extremely hot, largely molten planet. As it cooled, heavier ...

Add Yahoo as a preferred source to see more of our stories on Google. Here's what you'll learn when you read this story: To understand the mantle—the largest layer of Earth's rocky body—scientists ...

Planet Earth has some pretty great qualities going for it. (Negative reviews mostly revolve around the staff and clientele.) Pretty high on the list of positives is a richly oxygenated atmosphere. But ...