DNA in bones. Not actually etched in bone - like writing or artwork. Title should be "David Reich hopes to Unearth Human History in DNA".
Check this video from National Geographic (dated 2015) "DNA Genesis - The Children Of Adam - National Geographic Documentary Films - Full HD Documentaries" https://www.youtube.com/watch?v=3XWaRZf1A-Y
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[ 1.8 ms ] story [ 16.5 ms ] threadCheck this video from National Geographic (dated 2015) "DNA Genesis - The Children Of Adam - National Geographic Documentary Films - Full HD Documentaries" https://www.youtube.com/watch?v=3XWaRZf1A-Y