Explorers mapping Lake Michigan’s floor found dozens of massive, near-perfect circular holes at 500 feet deep, some over 600 feet wide. Sonar scans in 2022 revealed roughly 40 depressions arranged in eerie, footprint-like patterns no one has documented in the Great Lakes.
Explorers mapping the bottom of Lake Michigan have identified dozens of large circular depressions in the lakebed. The discovery was made using sonar equipment, and researchers are still determining what created the formations.In 2022, a team of researchers was using sonar to map the lake floor and search for shipwrecks. They expected to see standard rock formations and sand deposits. Instead, the…