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As Americans light sparkers for the Fourth of July holiday, NASA celebrates two decades of Mars exploration.

Last year's never-ending winter will allow two California ski resorts to stay open through the holiday weekend.

It's a bit of a drive, but not that far to go, if you want to see the total eclipse in August.

California's biggest reservoir is the one you can't see -- and it's far from overflowing.

In state's polluted San Joaquin Valley, an air pollution control officer is under fire for allying with members of Congress who want to weaken the Clean Air Act.

Suicides in medical schools, as well as studies showing an alarming number of medical students consider ending their lives, have prompted schools and residency programs to provide more support for mental health.

State lawmakers and local officials want better answers before Oroville's disintegrated spillways are rebuilt.

An increasing number of professional athletes are stimulating their brains electrically to gain a competitive edge.

In his new book, Bay Area environmentalist Paul Hawken describes 100 ways to slow or even reverse climate change.

More and more people are opting for 'nonbinary' gender identities as they reject the concept of gender as only male or female.

A teenaged girl turned to internet videos to be like the cool kids. Here's the story of what went wrong.

Amidst the Sierra's jumbled geology, a leading expert says Oroville's spillways were not built on the most solid rock.

Green car expert Ron Cogan says automakers can meet tough new fuel economy standards by 2025 if their feet are held to the fire.

A new approach to flood control favors restoring natural floodplains along rivers whose aging levees are failing.

The California Coastal Commission's new Executive Director pledges to protect the state's coastline even as President Trump vows to rollback environmental regulations.

The plight of ranchers in Tehama County points to the heart of the political divide.

SETI Astronomer Seth Shostak says privatized space tourism, like SpaceX's moonshot for millionaires, will bring the price of space travel down for everyone.

Mushrooms foragers are harvesting buckets of fungi from wet forests, but its not just wild mushroom that are on the rise. Demand for commercial mushrooms is also skyrocketing.

California fishermen and marine biologists are working to revive the coast's disappearing kelp forest.

Sunnyvale resident Mark Chung came home from vacation to a huge energy bill. Figuring out what happened gave him an idea for combating climate change.