1611: John Pell, who introduced the division sign (the obelus, ÷) to England, was born. 1862: Peter Barlow, who invented the Barlow lens that is commonly used to increase optical magnification, died. 1896: Henri Becquerel discovered radioactivity when he developed the photographic plate he left in a desk drawer and found it had fogged with the image of the uranium compound crystals resting on it. 1932: The infant son of Charles and Anne Lindbergh was kidnapped from the family home near Hopewell, N.J. 1954: The hydrogen bomb, code-named Castle Bravo, was exploded in a test over the Bikini Atoll in the Pacific Ocean. 1966: The Soviet unmanned spacecraft Venus 3 crashed (purposely) on Venus. 1990: The controversial Seabrook, NH, nuclear power plant won federal permission to go on line after two decades of protests and legal struggles. 1991: Edwin Land, inventor of the Polaroid Land Camera, died. 2006: Jordanhill Railway Station became the 1 millionth article on the English Wikipedia.