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The FDA says it has commissioned a lab study and a literature review to evaluate metals in tampons, after a recent study found heavy metals like lead in products by over a dozen popular brands.

A lynx stretching in the sun, tadpoles swimming beneath lily pads and an investigator dusting a tusk for prints are among the winning images from the newest Wildlife Photographer of the Year awards.

Scientists are using the video game Minecraft to study how humans learn, perfecting a classic Roman pasta dish with science, and a possible reason why more young people are getting colorectal cancer.

Trump called climate change a hoax. Biden calls it an existential threat. Washington Post journalist Juliet Eilperin talks about how Biden might reverse some of his predecessor's policies.

A study finds that carrion crows can be taught to count and make vocalizations that indicate the number counted, much in the same way that human toddlers do.

President Obama's trip to Africa comes at a time of increasing African economic growth and declining U.S. influence on the continent. To be successful, he will need to overcome a general perception that the United States has withdrawn from Africa. At the same time, he must convince an American public and private sector that getting more invested in Africa will be good for American jobs and the economy.

A dramatic faceoff on Capitol Hill, involving two generals and two female senators, appeared to only deepen the chasm between the four-star brass and those who want significant change in a system that has failed victims for decades.

A new virus in the Middle East has sickened more than 180 people and killed an alarming 43 percent of them. But scientists haven't been sure where the virus originates or how people catch it.

The pokes and prods inflicted on children in the hospital at all hours can make it hard for them to get a decent night's sleep. Children's hospitals are now rethinking how they work at night.

Once family-owned, luxury fashion houses have been gobbled by conglomerates. Industry watchers say designers have suffered from a pressure-cooker environment that focuses intensely on the bottom line.