Fun Science Facts
by gowtham[ Edit ] 2010-02-11 11:56:47
90 years ago: The Grand Canyon became a national monument & Cellophane is invented.
80 years ago: The food mixer and the domestic refrigerator were invented.
70 years ago: The teletype and PVC (polyvinyl-chloride) were invented.
60 years ago: Otto Hahn discovered nuclear fission by splitting uranium, Teflon was invented.
