Adventures in CyberSound: Thales Biography: Article drawn from Britannica Online, summarizing Thales' philosophical and geometrical legacy.
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.
Life of Thales: From the C.D. Yonge translation of Diogenes Laertius. Provided by Peitho's Web.
Myth - Thales: Overview of his thoughts on cosmology and the myths. By Stefan Stenudd.
Phoenicia: Thales of Miletus: A meticulous biography with reference to various ancient testimonia concerning this philosopher.
Thales Fragments and Commentary: From Arthur Fairbanks' 1898 work, The First Philosophers of Greece. Provided by the Hanover Historical Texts Project.
Thales of Miletus: Article by J.J. O'Connor and E.F. Robertson, from the MacTutor History of Mathematics archive. A discussion of the life and teachings of this thinker, with links to related articles.
Thales of Miletus: Lengthy article by Patricia O'Grady, in the Internet Encyclopedia of Philosophy. Discusses his life, teachings and impact.
Thales of Miletus: 1995 paper by Kathleen Norton, focusing on the geometrical theorems of Thales.
Thales of Miletus: Illustrated article by Don Allen with an emphasis on Thales' geometrical achievements.