It isn't quite clear how he died but we do know that he moved to Sweden in 1649.However he did not survive his first winter there.
In 1649, Queen Christina of Sweden offered Descartes to come and teach her either mathematics or philosophy in her castle. She apparently was a hard working person; Descartes was required to start his lessons with her at 5am! Descartes still maintained a life long habit he acquired in childhood to get up at 11 o'clock(he was very weak even when he was a boy, and was allowed to stay in bed for most of the morning); as he broke his habit, he broke his health too and died of pneumonia he managed to catch while on way to one of the cold early morning lessons.
Modern science also uses a clear method to discover answers to questions. (Apex)
Francine Descartes
Descartes' conclusion was "You think; therefore, you are."
Descartes' Error was created in 1994.
Descartes believed the self was dualistic
Rene Descartes invented the famous Cartesian coordinate system.He worked in the field of analytic geometry.
Rene desscartes was the father of mathematics.
== == Oddly enough, the place now called Descartes. Initially called La Haye en Touraine, the town was renamed La Haye-Descartes in 1802 in his honour, and then renamed again to Descartes in 1967.
Modern science also uses a clear method to discover answers to questions. (Apex)
Short answer: Descartes' doubt was like WWI - the doubt to end all doubt. Only by doubting everything could Descartes hope to find anything that was certain (even if the only certainty is that nothing else is certain!).
Some math mathematicians say that Descartes inspiration came from being in bed so late. But, this also came about because of his love for math and all of his studying.
Cao Ren died in 223.
Ren Yaxiang died in 662.
Ren Bishi died in 1950.
Ren Guang died in 1941.
Hong Ren died in 1664.
Ren Xun died in 1893.