Train crash Jul 26, 2013 17:33:50 GMT 1 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by marchesarosa on Jul 26, 2013 17:33:50 GMT 1 In view of the recent Santiago train crash, this explanation by Feynman on how trains (usually) stay on the tracks is informative.Fully-fledged member of the fraternity! I love this man!