Abel, Sir Frederick Augustus (1827-1902), a British chemist. He was an authority on explosives. With Sir James Dewar, Abel invented cordite, a smokeless gunpowder, in 1889. From 1854 to 1888, Abel was chemist to the British War Department. He was created a baronet in 1893.
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.
Albert Einstein was a pretty smart guy. When you look up the word "genius" in the dictionary, so the saying goes, it's a pretty safe bet you'll see Einstein's mug. Think you’re smart enough to take on a quiz about the famed thinker?