René Descartes

http://en.wikipedia.org/wiki/Ren%C3%A9_Descartes
http://www.iep.utm.edu/descarte/
http://www.britannica.com/EBchecked/topic/158787/Rene-Descartes
http://oregonstate.edu/instruct/phl302/philosophers/descartes.html
http://scienceworld.wolfram.com/biography/Descartes.html
http://www.earlymoderntexts.com/f_descarte.html


Videos
http://www.youtube.com/watch?v=BHihkRwisbE
http://www.youtube.com/watch?v=CtgE6FfuS_Q