As bones encased in rock rotted away, water-borne silica seeped into the crevices, solidifying into opal and preserving precious details for 100 million years.
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Oldest Known Aboriginal Pottery Discovered in Australia smithsonianmag.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from smithsonianmag.com Daily Mail and Mail on Sunday newspapers.