http://en.wikipedia.org/wiki/Ren%C3%A9_Descartes
http://www.philosophypages.com/ph/desc.htm
_ Three Minute Philosophy: Rene Descartes
http://www.youtube.com/watch?v=BHihkRwisbE
_ The Mark Steel Lectures-Descartes 1/3
http://www.youtube.com/watch?v=6G_kHtfDdwc