50 years ago, mysterious glass hinted at Earth’s violent past
Excerpt from the August 11, 1973 issue of Science News
Like Hansel and Gretel followed a trail of breadcrumbs, scientists have followed glassy particles called tektites (some shown) to the sites of major meteorite impacts around the world.
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Microtektites found in Caribbean may shed light on tektite origin — Science News, August 11, 1973
Though their origin remains a mystery to scientists, huge strewn fields of tektites have been found in widely separated areas of the world….