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American women are poised to win far more medals than any other women's squad in Rio. As part of their relentless rise, they're also expected to outpace the U.S. men.

Multiple testing options and false positives can leave parents confused about blood lead level readings. We found out how the tests work and what the results really mean for a child's health.

Our hashtag #FeminismInMyCountry trended in South Korea, a country reeling from recent attacks on women. Hear what they — and people in other countries — have to say.

Last August, 3 million gallons of orange wastewater flooded into Colorado's Animas River, ending up in Lake Powell. But Congress has failed to come up with a way to stop this from happening again.

Indulge in '90s nostalgia with a playlist highlighting The Smashing Pumpkins, Liz Phair and more.

An analysis of pediatric clinical trials found that the results of almost a third of studies that were finished weren't published in medical journals. The lapses raise scientific and ethical concerns.

Taking a cue from Khizr Khan's speech at the Democratic National Convention, protesters held up the booklets during a Trump speech in Portland, Maine.

Donald Trump, who has begun to slip in the polls, has charged that the outcome of November's election will be "rigged." President Obama blasted that as "ridiculous" in a wide-ranging news conference.

The free concert was supposed to be a celebration marking the end of the group's 1969 U.S. tour. But instead, it turned into chaos.

Medicaid and other health insurers require doctors to file time-consuming paperwork before allowing them to prescribe drugs that help people quit opioids. That delay fosters relapse, specialists say.