Gigantic hidden fortresses discovered 1,800 miles underground in Earth's mantle, rewrite how the planet's interior works.

Earth’s continents may look fixed on a globe, but they’ve been drifting, splitting and reforming over billions of years – and ...

It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

These five U.S. states sit near supervolcanoes that could one day erupt, with scientists monitoring these areas for signs of seismic changes that could trigger catastrophic geological events.

Senior strategic analyst Gen. Jack Keane (Ret.) discusses Israeli Prime Minister Netanyahu's threat to resume fighting if a ...