Tuesday, April 22: Happy Earth Day! Turn off those lights, take a walk in the rain, recycle some bottles and cans. Want to test your energy know-how? Click here! Earth Day, FYI, was first observed in 1970, the 100th birthday of Vladimir Lenin, a Russian communist who was a Bolshevik leader during the Russian Revolution and the premier of the Soviet Union from 1917 to his death in 1922. Coincidence? You decide.