Centripetal and centrifugal forces are central to circular motion, but they're not the same. Discover the differences between ...

U.S. employers and colleges are contending with more young people who are behind academically. Some are trying to make up ...

NPR's Scott Detrow talks with Robert A. Pape of the University of Chicago about what happens when democracies use military force to occupy their own territory. Weeks of talk of sending federal troops ...

U.S. Defense Secretary Pete Hegseth slammed "fat generals" and diversity initiatives that he said led to decades of decay in the military and told a rare gathering of commanders on Tuesday they should ...

President Trump has not committed to adding American forces to the mix in Ukraine. No one has detailed publicly what form defenses would take, but there are several options. By David E. Sanger ...