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Hormones from medical treatments wind up in wastewater, and that can be a problem. Some scientists think a version of a household chemical, hydrogen peroxide, could be part of the solution.

When disaster strikes in a country like Bangladesh, first responders are often regular folks who happen to be on the scene. Now they're getting training so they can face the risks and save lives.

One doctor alone is accused of causing nearly $23 million in fraud losses, including "over 1,000 expensive power wheelchairs ... that were not medically necessary and often not provided."

We rounded up a few sharp thoughts in the wake of Wednesday night's horrific attack on a historic black church.

The annual Man v. Horse Marathon in Wales sounds like a lopsided contest favoring racers with four feet. But scientists say that Homo sapiens evolved to be incredible endurance athletes, too.

If you didn't know better, you might mistake the hubbub for American politics. But amid the fickle endorsements and dust-ups, poet Simon Armitage won election as the newest Oxford professor of poetry.

A new report adds to the debate over the economic impact of the Affordable Care Act in advance of a much-awaited Supreme Court ruling.

It's Cameroon, closely trailed by Vietnam and India. Sugary fizzy drinks are making inroads in the developing world.

Few countries or cities have dared to try a "sin" tax on soda, so no one really knows if a tax would actually get people to drink less. Preliminary results suggest that the tax in Mexico is working.

The shooting at a historically black church in Charleston briefly put a pause on the campaign. But eventually politics crept back in, and both sides, as usual, took different lessons from the tragedy.