U.S. scientists unearth hot rocks from cold comet
HOUSTON (Reuters) – Particles from any icy comet that were collected and returned to Earth aboard a NASA science satellite show dozens of minerals that form only in extreme heat — a finding that complicates theories about how the solar system formed, scientists said on Monday…. NASA astrophysicist Scott Sandford, with the Ames Research Center in Moffett Field, Calif., said it is excruciatingly difficult to sort out cosmic organic matter from terrestrial elements, but at least one sample from the Stardust collection seems to contain indigenous carbon and hydrogen….
