Earth’s story may have hardened into place almost as soon as the Solar System began. That is the striking claim in new research tracing when the young planet locked in the chemical makeup that still ...

There are two enormous provinces of unusual rock that sit at the bottom of the mantle, just above the Earth's core. One of them is located underneath Africa and one is under the Pacific Ocean. They're ...

Imagine Earth containing the remnants of an ancient planet locked within its mantle. This intriguing concept has gained momentum with recently emerging seismic research showing two gigantic structures ...