How do scientists know how old Earth is? Learn how experts have measured Earth's age, and why it is more difficult to ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles within this cloud collided and clumped together, driven by gravity and ...

Water is at the center of one of the enduring questions about how life first formed on Earthr. More specifically, where did the very first water molecules form, and how? In 2020, researchers at ...

The moon is unlike anything else in the solar system. So how did our planet end up with such a special moon?

Researchers may have finally cracked the age-old mystery about the origins of Earth's water, and the answer might be related ...

How did Earth, alone among the solar system's rocky planets, become the home for life? How, among all this frigid lifelessness, did our planet become warm, hospitable, and life-sustaining? The ...

Earth is so far the only known planet on which life exists—with liquid water and a stable atmosphere. However, the conditions were not conducive to life when it formed. The gas-dust cloud from which ...