They seem to make up a system of interchangeable parts for an atlatl, or spear-thrower. "We found the first pieces in 2020 and then we've found other pieces every year," said Bryon Schroeder ...

“The oldest item found so far, a spear-thrower called an atlatl, was dated to almost 7,000 years old,” said the researchers in a 2023 paper, where they suggested it was the oldest one found on ...