Editor’s Note: Published in 1956, this article proved so popular that it served as the inspiration for Martin Gardner’s legendary Scientific American column Mathematical Games. Read more in ...

Celebrate the season with this paper handprint angel craft. With just a few supplies and the free printable template, the kids will love making little angels. Handprint crafts are a fun way to get ...

Peterson’s work is currently on view in Nordic Echoes — Tradition in Contemporary Art at Scandinavia House, which runs from ...