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Contact: John Cramer
Dartmouth College

Cosmic Impact, Dartmouth Geochemist Mukul Sharma

Caption: Using a binocular microscope, Dartmouth geochemist Mukul Sharma examines impact-derived spherules that he and his colleagues regard as evidence of a climate-altering meteor or comet impact 12,900 years ago.

Credit: Eli Burakian

Usage Restrictions: The photographer must be credited.

Related news release: Prehistoric climate change due to cosmic crash in Canada

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