Word: outs
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Dates: during 1990-1999
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In that 1905 paper, Einstein pointed out that because you could not detect whether or not you were moving through the ether, the whole notion of an ether was redundant. Instead, Einstein started from the postulate that the laws of science should appear the same to all freely moving observers...
This unease continued through the 1920s and '30s. When Einstein was awarded the Nobel Prize in 1921, the citation was for important--but by Einstein's standards comparatively minor--work also carried out in 1905. There was no mention of relativity, which was considered too controversial. I still get two...
This turned out to be one of the great missed opportunities of theoretical physics. If Einstein had stuck with his original equations, he could have predicted that the universe must be either expanding or contracting. As it was, the possibility of a time-dependent universe wasn't taken seriously until...
The trouble is, neither Witten nor anyone else knows how many other pieces must fall into place before scientists succeed in solving this greatest of all puzzles. One major reason, observes Columbia University physicist Brian Greene, is that string theory developed backward. "In most theories, physicists first see an overarching...
Over the years, enthusiasm for string theory has waxed and waned. It enjoyed a brief vogue in the early 1970s, but then most physicists stopped working on it. Theorist John Schwarz of Caltech and his colleague Joel Scherk of the Ecole Normale Superieure, however, persevered, and in 1974 their patience...