Archaeologists unearth an ancient hearth, containing four charred tobacco seeds, in northern Utah on October 11, 2021. Sarah K. Rice/Handout via REUTERS Archaeologists in Utah discovered four charred seeds of a wild tobacco plant in northern Utah. This is the earliest documented evidence of human tobacco use, dating back over 12,000 years. The researchers believe that hunter-gatherers may have used tobacco during food preparation. Archaeologists in Utah have unearthed a piece of evidence that suggests that the early inhabitants of North America were using tobacco around 12,300 years ago, Reuters reported. The discovery of four charred tobacco plant seeds in