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 ...

Bayesian analysis integrates prior knowledge with observed data, detailing methods for model specification, inference, and validation. This Primer highlights applications across multiple fields, while ...

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 ...