Eyebrows help keep sweat out of the eyes and women may be attracted by
male facial hair, but most of our body hair serves no function or
The muscle that allow animals to puff up their fur to keep warm or
intimidate predators. Humans sill have them which allows us to get goose
This foot muscle helps primates grasp with their feet. It’s disappeared in 9% of humans
Chimpanzees and gorillas have them. But only about 8% of humans have an extra rib.
It used to help early humans digest all the plant material they ate.
Now, more than 300,000 Americans have appendectomies each year.
A long muscle that runs from the elbow to the wrist. It could have been
important for hanging and climbing. 11% of people do not have one.
Humans used to have to chew a lot plants to get enough food to survive,
therefore the extra teeth. Today, only about 5% of the population has a
healthy set of Wisdom Teeth.
EXTRINSIC EAR MUSCLES
Three muscles that made it possible for early man to move their ears
independently of their heads, the way that dogs and cats can. These
muscles are why some people can learn to wiggle their ears