The earliest humans to settle the Great Lakes region likely returned to a campsite in southwest Michigan for several years in a row, according to a University of Michigan study.

Until recently, there was no evidence that people from the Clovis period had settled the Great Lakes region. The Clovis people appeared in North America about 13,000 years ago, during the geologic epoch called the Pleistocene. During the Pleistocene, sheets of glaciers covered much of the world, including Michigan, making the land inhospitable for human settlers. But a 2021 U-M study confirmed that Clovis people built a camp, now called the Belson site, in southwest Michigan.