Pythagoras of Samos  
   Detailed biography, including pictures, from the MacTutor History of Mathematics archive.
   http://www-groups.dcs.st-and.ac.uk/%7Ehistory/Mathematicians/Pythagoras.html

Encarta: Pythagoras  
   Encyclopedia article provides an introduction to the Greek philosopher and mathematician.
   http://encarta.msn.com/find/Concise.asp?z=1&pg=2&ti=761563435

Pythagoras  
   Student-written biography focuses on his most significant achievements.
   http://tqjunior.thinkquest.org/4116/History/pythagor.htm?tqskip=1

The Proof: Pythagorean Puzzle  
   A fun look at the man and one of his best-known equations. Includes Shockwave demonstration. From Nova Online.
   http://www.pbs.org/wgbh/nova/proof/puzzle/

The Theorem of Pythagoras  
   Brief description and proof of the Pythagorean theorem.
   http://www-spof.gsfc.nasa.gov/stargaze/Spyth.htm