A lone wolf was spotted 150 miles north of San Francisco, farther west than any of the pack animals have been documented in ...

They're loud, playful and one of San Francisco's most recognizable icons. But this summer, sea lions along the Central ...

What appeared to be an unusual rock in a San Mateo County creek bed was actually an intact Pacific mastodon molar from the ...

Learn more about a fossilized mastodon tooth that was originally mistaken for an oddly shaped rock.

On June 19, the Aquarium of the Pacific took in almost 500 animals in one go. Fish, marine invertebrates, and sharks were all ...

Gray wolves were wiped out in California by the 1920s and remained absent for decades before beginning a natural return to ...

Only one parent was caring for the chick when he was rescued by biologists; zoo officials hope he can be released to the wild ...

The proposal would have barred cosmetic gene-editing in pets while still allowing medical uses, but it stalled over concerns ...

After coming back from the brink of extinction in the 1980s, the birds are still considered critically endangered.

Recent rabies cases in California highlight the danger of bats. Learn how to protect your family from exposure.

Admirers of Jackie the bald eagle, who became an internet sensation from her perch overlooking Big Bear Lake, will have yet ...

Wildlife officials say that people spotted the wolf in late August, and a biologist confirmed the animal has been in the California area.