The idea that social groups can impact evolutionary success has been debated since Darwin first suggested it, over 150 years ...

Yellow-bellied marmots prefer grasslands and meadows within the Sierra Nevada. Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations ...

But secretive Sierra Nevada red foxes — genetically and geographically distinct from all other red foxes — can only live in the remote, high-elevation reaches of the Sierra Nevada and southern Cascade ...

The beavers were released into their native historic habitats as part of a pilot program to study their impacts on fighting ...

“The Sierra Nevada red fox is a vanishing emblem of remote Sierra wilderness and a harbinger of climate change,” said Jeff Miller, a senior conservation advocate at the Center. “Endangered Species Act ...

At an altitude of 3,479m, Mulhacén towers over the Spanish mainland. Clinging to the Sierra Nevada like a slumbering titan, it offers kilometres of paths under the heavens, between granite ridges, ...