As the whale migration season reaches its peak, new concerns arise over naval training exercises off the California coast.

A new approach to small-scale water "banking" could relieve stress on both the water supply and levees in California's San Joaquin Valley.

The Exploratorium, a San Francisco icon, will soon reopen as a stunning, new, energy efficient building on the city's Embarcadero.

San Jose is trying to lead the country in clean tech innovation. So how is the city doing?

They're out there... lurking in Earth's magnetic fields and damaging any satellite in their path.

The scientist dubbed "Dr. Doom" for his dire pronouncements about California's Sacramento-San Joaquin Delta is retiring after 33 years working on the troubled ecosystem that's central to California's water supply.

Not that long ago California’s herring population came perilously close to collapse. While their numbers are increasing, herring in the Bay are still struggling to return to their once prolific numbers.

For the first time in the Sierra Club's 120-year history, its national head was arrested for an act of civil disobedience. It signals a new, more aggressive stance for the organization spawned by John Muir.

They may sound like faulty plumbing, but male northern elephant seals have a unique communication system that's all about reputation.

Under a strategy known as "managed retreat," San Francisco gets ready to let the ocean reclaim a cherished stretch of Pacific coastline.