The oldest artefacts included four sharp stone flake tools used for cutting and scraping and 43 flakes of stone left over from making stone tools, as well as animal bone fragments and horse tooth fragments.
from Hindustan Times - lifestyle https://www.hindustantimes.com/art-and-culture/idaho-artefacts-show-human-presence-in-americas-16-600-years-ago/story-qeLGdMM68xAXn3leWknuqK.html>
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