https://blogs.mercola.com:443/sites/vitalvotes/archive/2019/12/23/chewing-gum-helps-researchers-study-ancient-microbial-dna.aspxFor the first time, researchers have been able to reconstruct a complete human genome without using physical remains. Instead, they used chewing gum — from the Stone Age. Gobs of birch pitch (tar) have been found around ancient toolmaking sitesenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)