Thales Fragments and Commentary  
   From Arthur Fairbanks' 1898 work, The First Philosophers of Greece. Provided by the Hanover Historical Texts Project.
   http://history.hanover.edu/texts/presoc/thales.htm

Eric Weisstein's World of Scientific Biography  
   Short article on Thales, emphasizing his mathematical and scientific achievements. Includes link to an article on Thales' Theorem.
   http://scienceworld.wolfram.com/biography/Thales.html

Thales of Miletus  
   Illustrated article by Don Allen with an emphasis on Thales' geometrical achievements.
   http://www.math.tamu.edu/~don.allen/history/thales2/thales2.html

Phoenicia: Thales of Miletus  
   A meticulous biography with reference to various ancient testimonia concerning this philosopher.
   http://phoenicia.org/thales.html

Adventures in CyberSound: Thales Biography  
   Article drawn from Britannica Online, summarizing Thales' philosophical and geometrical legacy.
   http://www.acmi.net.au/AIC/THALES_BIO.html

Life of Thales  
   From the C.D. Yonge translation of Diogenes Laertius. Provided by Peitho's Web.
   http://classicpersuasion.org/pw/diogenes/dlthales.htm