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发帖数: 298 | 1 By J. Kelly Beatty
July 19, 2002 | Crack open a primitive, carbonaceous meteorite, and you'll
likely be gazing at countless microscopic flecks of diamond — sometimes
numerous enough to total 0.1 percent of the meteorite's mass. Ever since their
discovery in 1987, these meteoritic "nanodiamonds" have been thought to be,
quite literally, stardust: tiny crystals of high-density carbon forged in the
expanding shock waves of supernova explosions. Researchers have long believed
that the diamonds preda |
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