ANN ARBOR, MI (AP)-- Scientists say they've found evidence of prehistoric caribou hunts on the floor of Lake Huron that illustrates the sophistication of ancient peoples whose survival depended on
understanding the habits of their prey.
An article released Monday in the Proceedings of the National Academy of Sciences describes what underwater archaeologists say was a "drive lane" where earlier civilizations targeted caribou 9,000 years ago.
At the time, it was a land bridge between what's now northeastern Michigan and southern Ontario. Today, it's submerged beneath 120 feet of water.
John O'Shea of the University of Michigan says the site and artifacts show the hunters used different approaches in fall and winter. He says the drive lane was a complex structure.