ATEN-POUND bite requires a forty-pound contraction of the human jaw muscles. That is because the jaws are built on the principle of a pair of tongs, The power is applied near the joint ...

Human evolution is often seen as a slow process ... Losing wisdom teeth This shift from hard, rough foods to softer, processed ones requires less chewing force, contributing to smaller jaws and jaw ...

And yet, its humerus (an arm bone) is quite human-like. Characteristics ... to back on the top of the skull) from which muscles running to the jaw were attached. A. boisei is similar to A.