About 1,800 miles (2,900 kilometers) below our feet, two enormous patches of strange rock sit above Earth’s core. New ...

Scientists may finally be closing in on the origins of two colossal, mysterious structures buried nearly 1,800 miles inside ...

Maybe the first life on Earth was part of an 'RNA world.' Artur Plawgo/Science Photo Library via Getty Images How life on Earth started has puzzled scientists for a long time. And it still does.

The earliest days of Earth held secrets that scientists are still trying to uncover. One of the greatest mysteries is how life began. A key part of the answer lies in a rare element: phosphorus. This ...

It isn’t easy to figure out how the Earth was built, because it happened 4½ billion years ago, and no one was there to watch. So scientists have had to look at what the Earth looks like now and at all ...

Scientists have discovered a meteorite older than Earth, offering the earliest clues to how the Solar System formed and how ...