Olympia oysters, whose native range runs from Baja California to southern Alaska, are being enlisted as ecological engineers ...

Where kelp forests used to grow, now legions of purple urchins can blanket the ocean bottom, creating urchin barrens. The barrens will persist until something—disease, predators, starvation, or ...

Photo by Scott Doniger Stewardship After Decades Away, River Otters Make a Triumphant Return to the Bay Area Scientists and volunteers track a remarkable return, and study how to keep it going ...

Bay Nature Talk: Sunflower Sea Star Join Bay Nature Magazine and Cal Academy marine biologists and experts Riah Evin and Elora López-Nandam for a virtual talk about sunflower sea stars on Wednesday, ...

A crow funeral can happen at any time. Farmers bear witness after shooting unwanted crows in their fields. Powerline workers see them should an unlucky bird zap itself and drop. Occasionally, the ...

Geology Capturing the Flood in California’s Ancient Underground Waterways Long buried riverbeds can move and absorb excess stormwater, storing it for future droughts.

Fire The Burning Question in the East Bay Hills: Eucalyptus Is Flammable Compared to What? Twenty-five years after the Oakland Hills fire, people still disagree about whether blue gum eucalyptus is a ...

The Guadalupe River runs through downtown San Jose. (Photo by Andrea Laue) Exploration The Guadalupe River and the Hidden Heart of San José Guadalupe River Trail in San Jose ...

Indigenous land repatriation is much discussed and little practiced in the Bay Area. Why is it so hard to return stolen land?

The Argentine ant is likely the most successful invasive species in California. But a 30-year dataset from Jasper Ridge Biological Preserve suggests they're not invincible.

This is the lichen world’s version of Theseus’s paradox: Is an object that has had every part removed and replaced the same object?