The oldest crust on Earth, known to be unchanging, is actually being altered in real time. The North American continent is ...

Scientists have unveiled the oldest woolly mammoth specimen ever discovered in North America as part of a major DNA study ...

The deep roots of Earth's oldest continents have long been thought to be unshakable. But a new seismic discovery suggests that even these stable landmasses can change. Beneath the center of North ...

The Yellowstone region's Beartooth Mountains feature some of the most ancient rocks in North America — as old as 3.96 billion ...

The artifacts discovered in a cave—which include dart tips, a boomerang and a spear-throwing tool—were dated to as far back ...

Archaeologists in Texas have discovered a cache of ancient hunting weapons, including the remains of poison darts, that is ...