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As fires continue to rage in California, smoke is causing health problems for some residents. Public health officials warn against breathing polluted air.

An advisory panel to the Food and Drug Administration recommends the agency accept Philip Morris' claims that its iQOS device, a cigarette alternative, reduces exposure to harmful chemicals.

Out of 44 publicly traded life sciences companies based in San Diego, only one has a female CEO.

Airs Saturday, Dec. 8, 2018 at 12:30 p.m. & Sunday, Dec. 9 at 7 a.m. on KPBS TV

The crash of the space rock that slammed into the Yucatan Peninsula also warmed up the Earth's atmosphere for 100,000 years. And scientists say it's a cautionary tale for people living today.

From Romaine lettuce to McDonald's salads, Goldfish crackers and Taco Bell queso, we hear more about food recalls and outbreaks. But many experts say our food supply is as safe as ever.

From Romaine lettuce to McDonald's salads, Goldfish crackers and Taco Bell queso, we hear more about food recalls and outbreaks. But many experts say our food supply is as safe as ever.

One of the difficult aspects of getting humans to Mars is the need to bring food. Researchers are experimenting with a way to make edible "microbial goo" with help from human waste.

The Trump administration has proposed a rule that would prohibit some home health workers from having union dues deducted from their paychecks. The rule would likely undercut unions' power, all agree.

See panoramic views of a trip to the moon in Skunk Bear's latest video. It's a journey that spans David Bowie's long career — and his greatest hits serve as the soundtrack.