Earth's biggest mountains, more than 100 times taller than Mount Everest, have been discovered on the boundary between Africa ...

Researchers used drone imagery to analyze the full scope of a massive, 3,000-year-old fortress in the Caucasus mountains.

President Donald Trump has issued a flurry of executive orders — including one to change the official name of North America's ...

A man died by suicide after firing several rounds on top of Stone Mountain, prompting a massive manhunt and park shutdown.