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Even at low doses, the potent poison damages organs and causes cancers. Now scientists have found a population high in the Andes Mountains that has adapted to the toxic metal over thousands of years.

Foods from Fukushima, Japan, are back to pre-accident levels of radiation but people still aren't eating them. One way to ease concerns: a chemical that blocks radioactive cesium from entering plants.

Sixty percent of parents think there is too much emphasis on testing. Are they right?

The Nigerian Islamist militant group has traded grainy videos for slick productions. This week, Boko Haram posted a video purportedly showing the bodies of two beheaded men accused of spying.

The cause was cardiac arrest, the Archdiocese of New York said in a statement. Cardinal Edward Egan was 82.

NPR's Robert Siegel talks to Katherine Meyer, an attorney with the Wildlife Advocacy Project, about how animal advocates are celebrating the end of elephants in the Ringling Bros. circus.

The number of registered voters in Oregon could soon increase dramatically.

Washington state Senator Jim Honeyford of Yakima has apologized after using the term “colored” to refer to people of color.

A Colorado program has allowed more than 30,000 women to get long-term contraception for free, lowering teen birth and abortion rates. Now lawmakers have to decide if it can qualify for state funding.

The Edmund Pettus Bridge is a sacred place in America's civil rights history. It also was named after a Grand Dragon of the state Ku Klux Klan. There's a strong generational divide on renaming it.