The thunder of hooves once shook the vast North American plains as millions of bison roamed free, sculpting the landscape in ...

A collection of 6,500-year-old wooden dart tips found deep within a Texas cave were likely, at one point in their usage, ...

Besides burning thousands of homes and displacing residents, the January fires, like earlier ones, upended the natural ...

Fifty thousand years ago, North America was home to towering giants. Mammoths roamed the tundra, saber-toothed cats hunted in ...

When the fur trade wiped out North America’s sea otters in the early 20th century, sea urchins—a favorite otter food—exploded ...