Roughly 4.5 billion years ago, a Mars-sized protoplanet named Theia slammed into the young Earth, causing a massive cataclysm that reshaped the very structure of the planet.This was a direct hit ...

Two life forms living together helped spark the evolution of all complex life. By learning to appreciate this process more ...

Within just a few million years, the continental plates begin to bend and squish toward each other. Around 200 million years ...

On a clear night, the moon you gaze upon looks the same as it looked for the first humans that walked Earth—the same ...

had been used as evidence to support the theory that plate tectonics started nearly as soon as Earth had solid ground — roughly 4 billion years ago. "That's probably a flawed argument now ...

“We also find an approximately 0.3 percent chance that Mars will be lost through collision or ejection and an approximately 0 ...

Life’s ultimate origin will never be known, but researchers are probing the possibilities—for Earth and elsewhere.

A study reveals that the oldest continental crust on Earth is slowly being broken up by shifting tectonic forces.

The strength of Earth’s magnetic field seems to rise and fall hand-in-hand with the abundance of oxygen in its atmosphere, a ...

Earth’s earliest crust may have looked a lot more like the continents we know today than scientists once believed. A recent study shakes up old ideas about how Earth's surface evolved, showing that ...

Iron ore deposits are about 1.3 billion years younger than previously believed, reshaping both scientific thinking and mining ...