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Scientists have had a hard time finding the weak spots of Cryptosporidium parvum, but now that's changing. It's not a common killer in the U.S., but it's a different story in the developing world.

The health agency says kissing and cuddling chickens could be contributing to outbreaks of salmonella. But backyard chicken owners aren't about to lay off the birds.

Just like World War II vets who were exposed to mustard gas during secret chemical testing, Vietnam vets exposed to Agent Orange had trouble obtaining VA benefits — until they got the law changed.

California is trying to do just that, though police and advocates for ex-offenders are at odds over whether it will work. The debate is playing out as President Obama is calling for nationwide change.

What are the obstacles that keep adults off the field? How can sports help keep kids and adults in good health? What are the best ways to encourage more widespread and enduring participation?

Four Marines died in Thursday morning's shootings in Chattanooga; three people were wounded. Officials have identified the gunman, who also died, as 24-year-old Mohammod Youssuf Abdulazeez.

We got milk when we domesticated goats and sheep around 9,000 BC. At first, that milk was easier to digest when fermented. So yogurt, along with other Neolithic foods, helped fuel civilization.

"These are young people who made mistakes that aren't that different than the mistakes I made and the mistakes that a lot of you guys made," Obama said after meeting with inmates in Oklahoma City.

Scientists believe soot that hangs over the mountains of Sichuan Basin — a byproduct of factories and cars — brought about the floods that devastated the region in 2013.

The Labor Department has suggested standards an employer must meet to consider a worker an independent contractor. Employment lawyers say this will lead to more lawsuits against employers.