Word: twins
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Dates: during 1970-1979
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...room full of marshmallows." The Mac copes differently with ice 2 ft. thick. The old cutter does not exactly knife through it. She just sort of squashes the stuff, bit by bit. As we hit a swath of virgin ice half a mile wide, out in the bay, the twin screws in the stern force the ship's nearly 2-in.-thick tempered-steel bow up over the edge of the ice. The ice bends, then yields with a deep, dull, grinding mutter. Below decks, it sounds as if the Mac is bumping along over...
Nowadays physicists rank quantum mechanics alongside relativity as one of the twin pillars of their science. But at its heart is an almost philosophical aspect that deeply troubled Einstein. It is the uncertainty principle, which says, for example, that it is impossible to tell both the exact position and the momentum of a single atomic particle?an electron, say?because the very act of observing disturbs it. Only by statistical means (like those used to determine probability in dice or poker) can a scientist predict what the results of such an experiment will...
These seemingly contradictory effects lead to a famous brain teaser called the Twin Paradox: If one twin goes off into space, which twin will be the older (if either is) when the brothers are reunited...
Einstein says there is a definitive answer and, therefore, no paradox. Be cause of other relativistic effects that stem from leaving and returning to earth, if one twin departs on a high-velocity space journey, he will be younger than the earth-bound brother when he returns...
...opinions that paved the way for a repetition of the United States's most familiar foreign policy fiasco. The Iran that the press and the U.S. government sought was one that would be westernized along the Shah's U.S. inspired model. At the root of Iranian protest were the twin grievances that Iran engendered--the oppression that the Shah required, and the challenge to cultural and nationalist ideals that westernization entailed. The press ignored those social grievances of opponents to the Pahlevi regime who cited vicious police state tactics, the dramatic concentration of wealth in the Shah's Iran...