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UC researchers find evidence of cosmic cataclysm 1,500 years ago at 11 ancient sites. The rapid decline of the Hopewell culture about 1,500 years ago might be explained by falling debris from a near-Earth comet that created a devastating.

United statesNew jerseyUniversity of cincinnatiDavid lentzStephen meyersSteven meyersKenneth tankersleyStephanie meyersLouis herznerLarry sandman university of cincinnatiUc college of artsUniversity of georgiaUc advanced materials characterization centerUniversity of georgia centerUs geologicalLarry sandman