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Scientists who tested a variety of cloth face masks found that a nylon overlay significantly boosted how well they work. Researchers not involved in the study praised the finding.

Punxsutawney Phil predicts more winter ahead. Groundhogs may not have a great track record when it comes to weather forecasts, but experts say the tradition sheds light on our culture and environment.

Staffers began receiving termination notices this morning as part of a major restructuring at HHS. Some senior leadership are on their way out too.

In the '50s, four people collaborated to create a pill that would allow women to enjoy sex. Jonathan Eig details the history in The Birth of the Pill. Originally broadcast Oct. 7, 2014.

Authorities returned the remains of Hayati Lutfiah Hamid to her family in a ceremony in Indonesia. It's the first of many more to come.

Confirming a long-anticipated move, the NFL has hired its first female official on a full-time basis. She has spent nearly a decade working her way through the ranks in the NCAA.

In his first news conference since an overwhelming victory for Republicans on Tuesday, the House speaker also said approval of the Keystone XL pipeline is a key item on the GOP agenda.

City Councilman Kevin Faulconer will fill the seat vacated by disgraced former Mayor Bob Filner, a Democrat. Filner left office after less than a year following sexual harassment allegations from more than a dozen women.

On a famous shopping street in Paris, children climb up to gaze at Christmas displays in shop windows. But inside these venerable stores, security is a top concern.

The State Department has created an online "embassy" for Iran to give Iranian civilians information about the U.S. The feature also has links to Twitter, Facebook and YouTube, all in Farsi.