Imagine scuba diving off Germany and stumbling on a half-mile-long stone wall built 11,000 years ago—by reindeer hunters! Scientists say this “Blinkerwall” was a massive team effort by Stone Age people to herd reindeer into traps. The wall’s still perfectly lined up on the seafloor because it got flooded, not destroyed. It’s wild to think ancient humans were this strategic and organized! Underwater archaeology just keeps getting cooler. #Science #archaeology #IceAge