The comet is now racing away from the sun following a close flyby on Jan. 20.

In the whole history of Earth's climate, few events are as extreme as those that geologists call "Snowball Earth." ...

New potential climate crisis just dropped.

The object is hurtling towards the Earth at a zippy 12,616 miles per hour, according to data from the space agency.

As much as 45 oceans’ worth of hydrogen may be in Earth’s core, scientists reported, suggesting most of Earth’s water was ...

"We don’t know where they are,” said NASA’s planetary defense officer Kelly Fast at the AAAS conference in Arizona this week.

Tiny zircon crystals are revealing that Earth’s earliest history may have included surprisingly complex tectonic activity.

NASA says Earth is about halfway through its lifespan. Scientists explain how solar changes could affect habitability, oceans, and the planet’s future over billions of years ...

Even when Earth was locked in its most extreme deep freeze, the planet’s climate may not have been as silent and still as ...

A new study analyzes three asteroid and two meteorite samples to see if space rocks smacking into Earth could’ve helped ...

Gravity feels reliable—stable and consistent enough to count on. But reality is far stranger than our intuition. In truth, the strength of gravity varies over Earth's surface. And it is weakest ...