The International Mathematical Olympiad (IMO) is a prestigious competition featuring talented high school students from around the world, in which competitors solve complicated mathematical problems.

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Leaf shapes play an important role in tree identification, providing key ...

NPR's Scott Simon speaks with Laura Atkinson and Justin Hicks of Louisville Public Media about shape note singing and its influence across the American musical tradition. Shape note singing is one of ...