PBS
Pbs: Nova: Infinite Secrets
Offers a look into the mind of Archimedes based on findings within newly discovered manuscript.
Museum of Science
Science Learning Network: Inventor's Workshop
A short piece on Leonardo da Vinci from the Science Learning Network. Placed here because a) there's a decent drawing of an Archimedes' screw, and b) there's a link to an adequate definition thereof.
Curated OER
Univ. Of Utah: Archimedes and the Computation of Pi
Contains information about the life and works of Archimedes. Includes a Pi applet. Has links to Eratosthenes of Cyrene, A listing of Pi to 10,000 digits, a biography of Archimedes, notes on Pi, and sources on Archimedes' screw.