Word: banging
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Dates: during 1990-1999
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...years before passing Earth. Should one suddenly appear on a collision course, traveling as fast as 217,000 km/h (135,000 m.p.h.) relative to Earth, defenders would not have the luxury of years of observation and of using a small explosion to deflect it. A quick nuclear bang would be needed...
...such a ratio prevails throughout the universe, the implications are vast. First, it would mean that there might be so much matter in the universe that the outward expansion ignited by the Big Bang would eventually be counteracted by the force of gravity. The universe would ultimately cease its expansion and begin to collapse under its own weight, imploding in a catastrophic finale that theorists have dubbed the Big Crunch. But the presence of so much dark matter also has implications for the question Alcock ponders: What is all this stuff made of? The more dark matter there...
...down quarks.) Exactly how much top quarks weigh is a question scientists are anxious to answer, but first they must find some to measure -- a task considerably complicated by the fact that in nature these massive but ethereal entities made only a cameo appearance, just after the Big Bang...
...quarks emerged from the primordial radiation "around a thousandth of a billionth of a second after the Big Bang," estimates University of Michigan theorist Gordon Kane. But as the early universe expanded and cooled, they vanished. Their fleeting existence left behind a fundamental puzzle that physicists are struggling to solve: What makes some particles so massive while others -- photons, for example -- have no mass at all? Because of its boggling heft, the top quark should help illuminate what mysterious mechanisms -- including perhaps other, still weightier particles -- are responsible for imparting mass, and hence solidity, to the physical world...
DIPLOMACY: Bush Goes Out with a Bang...