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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.

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.

NPR's Robert Siegel interviews Phillip Atiba Goff, president of the Center for Policing Equity, about his reaction to the Justice Department's investigation into the Ferguson, Mo., Police Department.

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.

The dramatic admission of guilt by Dzhokhar Tsarnaev's defense team in its opening statement Wednesday has generated questions about the trial now underway.

NASA's Dawn mission has reached its destination and is orbiting the dwarf planet Ceres. It's the end of an odyssey to explore an odd, in-between world.

New England businesses are taking stock after weeks of record-setting winter storms disrupted transportation, stopping many workers from doing their jobs. Telecommuting is helping Boston get by.

Some of the most iconic images of marchers being attacked by Alabama state troopers at the Edmund Pettus Bridge in 1965, were captured by a white photojournalist who stumbled onto the historic events.