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The first California condors to enter the wild in five years took a few hesitant hops on a sandstone cliff, craned pinkish necks over the pre

It’s hard to feel a sense of urgency about climate change--it feels so slow. Well, try telling that to the critters dealing with it. Because new data suggest that the climate will change more than 100 times faster than the rate at which species can adapt

The time piece has been a prototype for the last decade and a half.

Bear-size beavers, mammoths, horses, camels and saber-toothed cats used to roam North America, but by 11,000 years ago most such large mammals had died off. To this day, experts debate what caused this late Pleistocene extinction: climate change, overhunting by humans, disease--or something else? Eric Scott, curator of paleontology at the San Bernardino County Museum in Redlands, Calif., suggests it was something else: namely, the immigration of bison from Eurasia