DUGWAY PROVING GROUND, Utah - After a seven-year journey, a NASA space capsule returned safely to Earth on Sunday with the first dust ever fetched from a comet, a cosmic bounty that scientists hope will yield clues to how the solar system formed.
DUGWAY PROVING GROUND, Utah - After a seven-year journey, a NASA space capsule returned safely to Earth on Sunday with the first dust ever fetched from a comet, a cosmic bounty that scientists hope will yield clues to how the solar system formed.
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