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

Scientists have long known that Earth's core is mostly made of iron, but the density is not high enough for it to be pure ...

When we dream of landscapes, we might imagine rolling valleys or rugged mountains. But there is a whole landscape hidden from ...

Astronomers may have discovered a new Earth-sized exoplanet orbiting a Sunlike star just 146 light-years away. Before you pack a suitcase, however, there’s a catch: even if the find is confirmed, the ...

The Earth's magnetic field and oxygen evolved together over 540 million years, according to a major NASA study.

Why do some places wait 1,000 years to see a total solar eclipse while others get two in a decade? The surprising orbital ...

The catastrophic impact of an asteroid 66 million years ago brought death and devastation on Earth—but also fascinating new ...

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.

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

Life on Earth may have learned to breathe oxygen long before oxygen filled the skies. MIT researchers traced a key ...

Scientists may be one step closer in their hunt for signs of past life on Mars after the Curiosity rover's latest find.

Earth’s habitability may trace back to a precise chemical balance during its formation, one that kept life-critical elements from disappearing into the core or drifting into space.