15 Human Body Parts That Will Disappear In The Future
The world has evolved, and so has the human body, which has many parts that are no longer useful.
1. Body hair
While the facial hair has a role, like for example the brows keep sweat from our eyes, most of the hair on our bodies serves no function.
2. Paranasal sinuses
Nobody really knows why we retain these troublesome mucus-lined cavities. One explanation may be that they make the head lighter.
3. Extrinsic ear muscle
While they are useful for some animals such as rabbits or dogs, they serve no purpose when it comes to humans.
4. Wisdom teeth
In early times, humans needed these to chew on plants and roots, but now only 5% of people have a set of healthy wisdom teeth.
5. Neck Rib
1% of people still have a set of cervical ribs, possibly a leftover from the age of reptiles.
6. Palmaris muscle
11% of humans don't have this long narrow muscle which runs from the elbow to the wrist, once important for hanging and climbing.
7. Male nipples
The reason both men and women have nipples is that in the early stages of fetal development, the fetus is sexless.
8. Arrector pili muscles
The tiny muscles allow animals to puff up their fur in order to intimidate. Humans don't really have the fur anymore, so they are pretty useless.
The narrow muscular tube attached to the intestine used to help the digestion of cellulose, back when humans ate mostly plants.
10. Thirteenth rib
8% of humans have an extra set of ribs, specific to chimpanzees and gorillas.
Scientists discovered that humans used to walk and balance in the middle of their feet, but now we have gradually transferred to balancing more toward the side of our big toe. According to researchers, our center of balance is still shifting inward, so don't rely on our toes as much. If the trend keeps up, at some point we won't need our toes any longer.
Also called a tail-bone, the coccyx is all that's left of the tail that most mammals use for balance and communication.
13. Third eyelid
A common ancestor of birds and mammals may have had a membrane for protecting the eye and sweeping out debris. Humans retain only a tiny fold in the inner corner of the eye.
14. Darwin's Point
Some humans have a small folded point of skin toward the top of each ear. It may be a remnant of a larger shape that helped focus distant sounds.
15. Subclavius muscle
This small muscle, stretching under the shoulder from the first rib to the collarbone, would be useful if humans were still walking on all fours. Some people have one, some have none, others have two.