Cosmic Impact, Dartmouth Geochemist Mukul Sharma (IMAGE)

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

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