NEW! Images and descriptions of the mathematical paintings of Crockett Johnson in the Smithsonian collections are now available on-line at the NMAH web site. The web address is: http://americanhistory.si.edu/collections/group_detail.cfm?key=1253&gkey=192&page=1.

A very interesting radio program about M.C. Escher, called The Essence of Escher.
http://www.publicbroadcasting.net/wypr/.artsmain/article/11/1351/1519400/Radio/The.Essence.of.Escher