1833: French mathematician Adrien-Marie Legendre, who introduced the Legendre Polynomials, died. 1862: American firearms manufacturer Samuel Colt died. 1863: London's Metropolitan, the world's first underground passenger railway, opened to the public. 1901: Oil was first discovered in state of Texas (first oil in the U.S. discovered in PA). 1936: American astronomer Robert Wilson, who co-discovered the cosmic microwave background noise at Bell Labs, was born. 1946: The U.S. Army Project Diana team used a 180 Hz signal pulse with a 1/4 sec duration to detect radar signals reflected off the moon's surface - the echo was received 2.4 seconds later. 1984: Clara Peller first asked, "Where's the Beef?"