Schiphol writes: A long-lost letter by René Descartes has come to light at Haverford College, where it had lain buried in the archives for more than a century, and the discovery could revolutionize our view of one of the 17th-century French philosopher's major works.
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 internet speed test! ×