California's Delta is a far cry from what it once was. About 97% of its historic marshes have been lost and scientists aren’t quite sure what the Delta once looked like. Now, a Bay Area group is working to reconstruct it through historical detective work.

The Sacramento-San Joaquin Delta has been the subject of a decades-long water war, but most Californians have never heard of it. Can the state break the water deadlock?

This year marks the 75th anniversary of an icon. When it opened in 1937, the Golden Gate Bridge was the longest suspension bridge ever built, constructed in one of the world’s most challenging settings. For the men who poured the concrete, and drove in each iron rivet, it was a life changing experience.

One Bay Area man brings "hands-on" science to low-income neighborhoods.

Planet hunters enter a new phase in their search for extra solar planets and alien life.

To comply with California law, furniture makers treat the foam in cushions with flame-retardant chemicals, up to two pounds of chemicals in an average-sized sofa. Those chemicals can turn up in household dust, blood, and breast milk. But efforts to remove them have been blocked by the chemical industry.

Lightkeeper Peter Berkhout takes QUEST radio reporter Craig Miller to see a genuine rarity: one of perhaps two or three remaining vintage foghorns anywhere in the U.S. that’s still in working order.

Biologists say more than 800,000 Sacramento Chinook are off the coast right now. It’s the biggest number they've seen since 2005.

Did you know the federal government has a clean tech venture fund? It's called ARPA-E, and QUEST talks with the head of the program about some potentially transformational energy ideas.

Just one year after the disaster in Japan, proposed budget cuts could impact the US tsunami warning program.