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    Nanodiamonds

    A theory explaining the second Ice Age rests on the discovery of these tiny sediment structures.

    Amanda Dobbins
    by Amanda Dobbins

    Community Contributor

    Scientists who claim that a comet wiped out all North American life 12,900 years ago think nanodiamonds prove their point, as their wide distribution would result from the shattering of such a comet. Other scientists are really, really skeptical of this idea and think you're stupid for believing it. The mystery of life marches on.

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