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Robberg stone artefact industry
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Neolithic
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2019-10 - New research supports hypothesis that asteroid contributed to mass extinction - Wits University
http://www.wits.ac.za/news/latest-news/research-news/2019/2019-10/new-research-supports-hypothesis-that-asteroid-contributed-to-mass-extinction.html
Clovis culture
Robberg stone artefact industry
Younger Dryas impact hypothesis (YDIH)