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

Scientists at Stanford have unveiled the first-ever global map of rare earthquakes that rumble deep within Earth’s mantle rather than its crust. Long debated and notoriously difficult to confirm, ...

“What keeps me up at night is the asteroids we don’t know about," said NASA's planetary defense chief.

New potential climate crisis just dropped.

It may become impossible to fix ...

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

With an estimated 6 sextillion kilograms of the stuff—that’s 21 zeroes by the way—the Earth’s core is another example of why hydrogen is the most abundant element in the universe.

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

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

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

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 ...