http://emma.manymedia.com:80/show-n-tell/
http://sln.fi.edu/
http://volcano.und.nodak.edu/
http://www.hcc.hawaii.edu/dinos/dinos.1.html
http://www.uni.uiuc.edu/departments/math/glazer/fun_math.html
gopher://ftp.bio.indiana.edu/11/Other-Gophers-and-Things/Images/
http://www.exploratorium.edu/