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 ...

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 ...

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 ...

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

Long before Earth formed, tiny mineral grains were already drifting through space, forged in the final breaths of dying stars ...