On This Day:  November 29

1935 -- Aus­tri­an physi­cist Er­win Schrödinger pub­lish­es Die gegen­wär­tige Si­t­u­a­tion in der Quan­ten­mechanik, which the­o­rizes that a cat might die if en­cased in an air­tight, food­less con­tain­er with cyanide and a ra­di­a­tion source. It is con­sid­ered one of the clas­sic thought-ex­per­i­ments of the twen­ti­eth cen­tu­ry.