“Nanodiamond” Find Supports Comet Impact Extinction Theory

Publication: National Geographic News   Date: January 5, 2009   View Article

The discovery of tiny “nanodiamonds” supports a controversial theory that a catastrophic bombardment of space rocks altered the course of Earth history.

About 12,900 years ago, Earth was escaping the grips of an ice age when something triggered a sudden refreeze.

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