1940's By bjthorness Sep 9, 1940 Penicillin Was Introduced Penecillin was introduced in the fall of 1940. Apr 5, 1941 M&M's were invented M&M's were originally invented for the U.S. Army Nov 14, 1941 First Animated Superman Show Feb 28, 1943 The Slinky was invented Jun 6, 1944 D-Day D-Day happened. May 13, 1945 First Atomic Bomb Was Tested Aug 9, 1947 Elmer's Glue Is Introduced May 14, 1948 Irael Is Now A State May 22, 1948 First Electric Blanket Was Invented Dec 19, 1949 Silly Putty Was Created
