"This study actually showed that Clovis points were more effective than what was presumed to be the butchery tool: large stone flakes," says Metin Eren at Kent State University in Ohio. The five hunters, associated with the MeatEater outdoor lifestyle company, took just 3 hours and 10 minutes to completely butcher the bison carcass using both stone tools. But the Clovis points achieved a butchering efficiency of 0.38 kilograms of meat per minute, whereas the handheld stone flake tools processed 0.34 kilograms of meat per minute.