>>17865428
In australia, people built these stone structures that would direct fish into small channels where they would be caught easily. The most mind blowing part is that this wasn't a passed down tradition. They were simply continously using the same dams built by their ancestors tens of thousands of years ago to the point they had forgotten who built them or how to build them. Estimates for these stone fishing dams range from 10,000-40,000 years ago