From Arthur Fairbanks' 1898 work, The First Philosophers of Greece. Provided by the Hanover Historical Texts Project.

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.

Lengthy article by Patricia O'Grady, in the Internet Encyclopedia of Philosophy. Discusses his life, teachings and impact.

1995 paper by Kathleen Norton, focusing on the geometrical theorems of Thales.

Short article on Thales, emphasizing his mathematical and scientific achievements. Includes link to an article on Thales' Theorem.

Illustrated article by Don Allen with an emphasis on Thales' geometrical achievements.

A meticulous biography with reference to various ancient testimonia concerning this philosopher.

Article drawn from Britannica Online, summarizing Thales' philosophical and geometrical legacy.

From the C.D. Yonge translation of Diogenes Laertius. Provided by Peitho's Web.

Overview of his thoughts on cosmology and the myths. By Stefan Stenudd.