Word: throughs
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Dates: during 1990-1999
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One political leader who rivals Roosevelt in embodying freedom's fight is Winston Churchill. Indeed, it's possible to imagine a President other than Roosevelt leading America through the war, but it's nearly impossible to imagine someone other than Churchill turning the world's darkest moments into Britain's...
King, who began studying Gandhi in college, was initially skeptical about the Mahatma's faith in nonviolence. But by the time of the Montgomery bus boycott, he later wrote, "I had come to see early that the Christian doctrine of love operating through the Gandhian method of nonviolence was one...
His crowning glory, perhaps the most beautiful theory in all of science, was the general theory of relativity, published in 1916. Like the special theory, it was based on a thought experiment: imagine being in an enclosed lab accelerating through space. The effects you'd feel would be no different...
Soon, however, discrepancies with the idea of an all-pervading ether began to appear. You would expect light to travel at a fixed speed through the ether. So if you were traveling in the same direction as the light, you would expect that its speed would appear to be lower...
The most careful and accurate of these experiments was carried out by Albert Michelson and Edward Morley at the Case Institute in Cleveland, Ohio, in 1887. They compared the speed of light in two beams at right angles to each other. As the earth rotates on its axis and orbits...