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Humans rely on dogs to search for bombs. But the increasingly common improvised explosive devices can be made with ordinary ingredients — and that is posing a new challenge for bomb-sniffing dogs.

Experts are scrambling to define the scope of the water contamination disaster in the city of nearly 100,000 and determine how to replace corroded pipes, while making sure to keep the public informed.

Most health officials say the small amounts of benzene and other components of the natural gas still leaking in Southern California are probably not a health threat. Still, some parents worry.

Hundreds of people crowded into Cleveland High School Tuesday night with questions, concerns and demands for officials addressing Portland's air pollution.

Experts say the field of forensic DNA is having a moment of truth about years of overstated claims, and it may tarnish its reputation as the "gold standard" of legal evidence.

California is first in a lot of things, but voting isn't always one of them. In the last election, less than a third of eligible voters cast a ballot. And…

An adviser to Gov. Jerry Brown says the well that has been leaking since October could be capped in days — sooner than the end-of-February target that had been set by the utility that owns the well.

The Food Surgeon, a channel on YouTube, turns a camera and a doctor's operating tools on familiar foods. It's just art, says the guy behind the videos, a food-loving engineer in Seattle.

The term has also been used to cover certain ideas, attitudes, movements and schools of thought. It has been affixed to leading American politicians, in both major parties, including Teddy Roosevelt.

Oregon lawmakers are considering a measure that would close what some activists call a "loophole" in the state's criminal background check law. It...