Bell, Robert (1841–1917), a Canadian geologist. He mapped much of the area around Hudson Bay and named thousands of Canadian lakes, rivers, and other geographical features. Bell was born in Toronto and attended McGill University. He joined the Canadian Geological Survey in 1856 and became its director in 1901.
He's ventured to the abyss of black holes, wagered on the information paradox and floated around in zero gravity. Meet the man, the legend, the super scientist: Stephen Hawking.
He is famous for a phrase he never said, for wearing turtlenecks and for hosting the original 'Cosmos' TV series. As enthusiastic about the stars as he was about marijuana, Carl Sagan led a very surprising life. Here are 10 cool facts.