Earth formed around 4.54 billion years ago. Knowing how old Earth is can be more difficult to confirm because Earth's age is not only based on the age of rocks, but also the isotopic estimates of what ...

While much attention is focused on the mysteries of deep space, there is an equally intriguing mystery closer to home, but in the opposite direction: deep underground. One particular mystery arose ...

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 ...

Crystals hidden in Australia’s oldest rocks have revealed new clues about how Earth and the Moon formed. The study suggests Earth’s continents didn’t begin growing until hundreds of millions of years ...

Earth is often described as a water world, but how that water arrived has never been settled. For years, the focus has rested on asteroids and comets .