Research Reveals Chimpanzee’s Stone Tool Choices Mirror How Ancient Human Ancestors Used Them Researchers have noted a stark ...

This heavy-duty tool has a standard pistol-style grip ... a concrete walkway, or a stone countertop, yet a hammer drill fitted with a masonry bit will easily bore through these dense materials.

The hammer is held in the hand and brought ... similar techniques when choosing stones for use as tools. More information: D.R. Braun et al, Stone selection by wild chimpanzees shares patterns ...

These tools were made by pecking and grinding until the desired shape was achieved. Like a hafted maul, the hand maul had to be made from a type of stone that could be used as a hammer without ...