Hints of Previously Unknown Asteroid Impact Found in Florida Clam Fossils

The tiny spheres, evidence of a long-ago asteroid strike, are smaller than grains of salt. (Credit: Mike Meyer/Meteoritics and Planetary Science) In 2006, an undergraduate student from the University of South Florida named Mike Meyer spent his summer collecting fossils from the walls of a quarry. In typical intern glory, his job was to pry open fossilized clams and wash away sediment, looking for shells of long-dead single-celled organisms. Instead, he found what appeared to be miniscule

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