National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

A group of scientists, including Sergey Frolov, professor of physics at the University of Pittsburgh, and co-authors from Minnesota and Grenoble have undertaken several replication studies centered ...

There are five main categories of birth control methods: natural, over-the-counter, prescription, permanent, and emergency. You should use birth control if you do not want to get pregnant right now ...