Posted on March 4, 2020September 29, 2020 by AReditorialDept Oregon Mortars & Pestles, Millions of Years Old CAPTIONS: James Furman Kemp, 1897; mortar and pestle found in auriferous gravel, Spanish Plat, El Dorado County, California In… You must be logged in to view this content. Post navigationPrevious post: Junk DNA or Not?Next post: Secrets of the Stars