For years, an elaborately displayed tooth at the Art Institute of Chicago has been thought to belong to the major Christian religious figure John the Baptist. As it turns out, that claim has no teeth.

The groundhog (Marmota monax), a.k.a. the woodchuck, is celebrated in folklore and cinema. Each year on February 2 America’s most most famous groundhog, Punxsutawney Phil, becomes a weather ...