Museums

The Field Museum of Natural History in Chicago houses the massive, menacing skeleton of Sue, the world's most complete Tyrannosaurus Rex. The site offers an excellent exhibit on Sue, but the other features are just as engaging. Underground Adventure transforms visitors to 1/2-inch tall to explore the world of soil and insects. Other great online exhibits explore butterflies, anthropology and women in science.

The Andy Warhol Museum showcases the artist's work in his hometown of Pittsburgh, Pennsylvania. The website shows many examples of his work, a calendar of events and links to the online store.