an unusual ability relative to other primates, but a necessary condition for a fully extended arm during hanging. The forelimb bones are long among apes, especially in gibbons. At the wrist ...

First Family: toe bones Toe bones found among the First Family are long compared to those of humans, but they don't curve forward toward the heel as they do in modern tree-climbing primates.

Instead, primates are usually preserved as petrified teeth and bones that can be extracted from ... to comprehend deep time like unrolling a long strip of paper and ticking off time intervals ...