Word: alls
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Dates: during 1990-1999
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Fleming serves well as a symbol of all the great medical researchers, such as Jonas Salk and David Ho, who fought disease. But he personally did little, after his initial eureka! moment, to develop penicillin. Nor has the fight against infectious diseases been so successful that it will stand as...
Einstein went on to show that energy and matter were merely different faces of the same thing, their relationship described by the most famous equation in all of physics: energy equals mass multiplied by the speed of light squared, E=mc2. Although not exactly a recipe for an atomic bomb...
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...
It took three years for astronomers to test this theory by measuring how the sun shifted light coming from a star. The results were announced at a meeting of the Royal Society in London presided over by J.J. Thomson, who in 1897 had discovered the electron. After glancing up at...
Einstein also continued his contributions to quantum physics by raising questions that are still playing a pivotal role in the modern development of the theory. Shortly after devising general relativity, he showed that photons have momentum, and he came up with a quantum theory of radiation explaining that all subatomic...