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." ...

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.

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.

"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.

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 ...

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

Astronomers have searched the skies for signs of extraterrestrial technology for decades. These searchers since 1960 have scanned the Milky Way for radio waves, optical flashes, infrared heat and ...

Some bacterial species possess an astonishing ability: They use Earth's magnetic field to orient themselves. To better ...