Earth's largest gold reserves are not kept inside Fort Knox, the United States Bullion Depository. In fact, they are hidden ...

Samples from Hawaii seem to contain material that passed across the boundary between the planet’s core and its mantle, nearly ...

Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here's what to know.

We know Earth is old. Scientists estimate that our planet formed around 4.5 billion years ago. But how old is it exactly? And ...