When we look at the solid ground beneath our feet, it's easy to assume Earth has always been this way. But our planet tells a story so extraordinary, so ...

Blue oceans, green forests, a cozy blanket of oxygen. Our planet is a super comfy home. It’s hard to imagine there was ever a time it didn’t exist. I asked my friend Julie Ménard how Earth formed. She ...

Billions of years ago, in the giant disk of dust, gas, and rocky material that orbited our young sun, larger and larger bodies coalesced to eventually give rise to the planets, moons, and asteroids we ...

Geologists have detected a unique chemical signature, a deficit of potassium-40, in ancient mantle rocks. This anomaly suggests that remnants of "proto-Earth," material predating our planet's ...

Scientists still have many questions about the earliest years of our planet. Earth formed about 4.55 billion years ago, but almost no rocks from that time have survived. Without those ancient rocks, ...