Ear Human vestigiality

the ears of macaque monkey , other monkeys have far more developed muscles of humans, , therefore have capability move ears better hear potential threats. humans , other primates such orangutan , chimpanzee have ear muscles minimally developed , non-functional, yet still large enough identifiable. muscle attached ear cannot move ear, whatever reason, can no longer said have biological function. in humans there variability in these muscles, such people able move ears in various directions, , can possible others gain such movement repeated trials. in such primates, inability move ear compensated ability turn head on horizontal plane, ability not common monkeys—a function once provided 1 structure replaced another.

the outer structure of ear shows vestigial features, such node or point on helix of ear known darwin s tubercle found in around 10% of population.