CAMBRIDGE, England â British scientist Stephen Hawking has decoded some of the most puzzling mysteries of the universe but he has left one mystery unsolved: How he has managed to survive so long with such a crippling disease.
Brownian movement. n. 1. (General Physics) random movement of microscopic particles suspended in a fluid, caused by bombardment of the particles by molecules of the fluid. First observed in 1827, it provided strong evidence in support of the kinetic theory of molecules.
John Brown was an American abolitionist who believed in and advocated armed insurrection as the only way to overthrow the institution of slavery in the United States. Brown first gained attention when he led small groups of volunteers during the Bleeding Kansas crisis of 1856. Dissatisfied with the pacifism of the organized abolitionist movement, he said, These men are all talk. What we need is actionâaction! In May 1856, Brown and his supporters killed five supporters of slavery in the ...