An ancient caribou hunting site discovered on the floor of Lake Huron reveals an elaborate network of blinds and herding structures that Native Americans used an estimated 9,000 years ago.
Using underwater sonar and two remotely operated vehicles, a team of researchers from the University of Michigan photographed the hunting site and published their findings Monday in the journal Proceedings of the National Academy of Sciences.
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The hunting site, etched into the floor of Lake Huron some 250 feet below the water level, comprises two parallel lines of stone that Native Americans reportedly used to corral caribou, according to LiveScience.com.
Scientists said that Lake Huron served as a centerpoint of the caribou's seasonal migration.
"The fact that all of the migrations tend to converge on these locations . . . would have provided predictability for ancient hunters, which is why we see so many structures located in these spots," study co-author John O'Shea, a researcher at the Museum of Anthropological Archaeology at the University of Michigan, told LiveScience.com.
If the ancient hunting structures "were on solid ground, [they] probably would've been bulldozed away for a Walmart parking lot by now," Alan Osborn, an archaeologist from the University of Nebraska-Omaha and the University of Nebraska State Museum, said to USA Today.
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