On a mountain ridge in Peru, a 1-foot-long creature with a venomous bite sat in the afternoon sun. Its “distinct” yellow-ringed eyes scanned its surroundings, but it wasn’t the only one looking around ...

Multilevel selection is a controversial concept originally proposed by Darwin. A new study found evidence for it in the wild ...

The mountain yellow-legged frog was once the most abundant amphibian in Southern California's Sierra Nevada and Transverse Ranges. Just decades ago, it was hard to walk around many of California's ...

A mountain lion led authorities on a chase around a suburban Camarillo neighborhood Wednesday afternoon. Authorities received ...