The flat side of the bone contains puncture ... They found that placing hides over a bone and hammering a pointed, chisel-like flint tool through the hide resulted in the same types of puncture ...

In the late Jurassic era roughly 156 to 144 million years ago, this area was a flat plain etched ... of rock with a chisel. He noticed Escaso peering closer at the bones. “Qué tienes?” ...

Found at an archaeological site south of Barcelona, the roughly 11-centimeter-long bone fragment contains 28 punctures scattered across one flat side ... a pointed stone chisel — by tapping ...

have taken a major step by creating the exact replica of a bone using a system that pairs biothermal imaging with a heated "nano-chisel." In a study, "Cost and Time Effective Lithography of ...