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OK, so they're not using Fitbits. But zoos across America are using software to minutely track the activity, behavior and physiology of captive elephants, and using that data to improve zoo life.

In the test, kids get a treat. If they don't eat it for, say, 10 minutes, they're promised a second treat. In a new interview, Serena Williams tells how she thinks she'd fare. What do most kids do?

Host Michel Martin talks to Jason Williams, who was just elected to become district attorney for Orleans Parish in Louisiana.

President Trump said the health agency delayed raising the alarm on the threat from the new coronavirus. A WHO expert says that in early January, the World Health Organization "was very, very clear."

In an open letter, influential conservatives urge President Trump to keep his embattled chief of staff and remove the "acting" from his title.

Health officials have long known that virus from the oral vaccine can contaminate water supplies; they underestimated how big a problem this would be.

In Mumbai, beaches are strewn with plastic trash, so now there's a ban on plastics — and penalties for violators. But there are some exceptions.

So far this year, there have been only six cases of wild polio — and 21 cases of vaccine-derived polio, most of them in Syria.

Nearly 90 percent of Kentucky's electricity is from coal — the cheap energy source that helped build its manufacturing economy. Now it's struggling to respond as more businesses want clean energy.

China has had a complicated history with golf. At one time, the country seemed golf crazy, but it became synonymous with corrupt officials. Once again it is in the crosshairs of China's government.