Colorado wildlife authorities have ended their search for mountain lions along a hiking trail where a woman was killed in an ...

Sulfur butterflies glide across Zorrillo Canyon, hundreds of them, moving back and forth against the cerulean sky. It's ...

Exxon, Chevron, Phillips 66 and others already operate refineries capable of processing the kind of heavy crude that comes ...

The seven continents on Earth – Europe, Antarctica, Asia, Australia, South America, North America, and Africa – are often ...

President Trump said in his Saturday address that America’s biggest oil companies, based in Houston, will fix Venezuela’s broken industry.

Side-blotched lizards probably don’t call the game that, but they play a version of it anyway. A new study explains the ...

Plus, pocket-sized owls hooting, few family reunions in the bird world and a visit by robins’ handsome cousin.

Sharks, alligators, bears, snakes, mountain lions - find out how widespread America's most feared animals really are.

Most shark bites in Florida are not deadly. However, there was an unfortunate 2010 attack where a 38-year-old Stuart man who ...

Calakmul remained relatively undisturbed until gum harvesters in Mexico led an American botanist to them in 1931. Here’s what was found in its remnants. Structure II, a pyramid at Calakmul, was ...