A UC Davis study found a population of Bay Area ground squirrels hunting and eating voles, suggesting the species may be more flexible in its diet than previously thought.
The Biden administration has approved California's plan to require new vehicles sold in the state by 2035 to have zero-emissions. President-elect Trump has said he would role back the rules.
Los Angeles County health officials have identified three more cats with presumptive H5N1; the source of the virus has not yet determined, but experts suspect raw meat.
As the CDC confirmed severe illness in a Louisiana patient hospitalized with H5N1 bird flu, California Gov. Gavin Newsom declared a state of emergency related to the virus.