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

Amanda Dobbins Community Contributor posted about 3 years ago