https://phys.org/news/2018-10-interior-northwest-indians-tobacco-european.html > "Usually in archaeology we just find little pieces of artifacts, things that you might not think much of," she said. "But the information that we can extract from them on a molecular level is phenomenal." > Indeed, writing in the Proceedings of the National Academy of Sciences, the researchers say their dating of various materials reveals "the longest continuous biomolecular record of ancient tobacco smoking from a single region anywhere in the world."