Please keep in mind that these are just theories and it’s a possible way of evolution!
According to Darwin’s theory of evolution humans evolved from apes. Before evolving our bodies were all covered by hair and we were crawling on our fours. While the apes stayed almost the same, we changed and started walking on two feet. We have inherited some traits that are useless nowadays.
It’s considered that our bodies are constantly evolving. Here is a small list on how we are going change in the next a couple hundred years.
1. Body hair
In the past, the whole body was covered with hair, which, except for warming, used to attract a partner.
2. Paranasal sinuses
They are designed to make the head lighter and some scientists believe that this have something to do with started walking on two feet. There are different opinions if we need the paranasal sinuses now or not.
3. Auricular ear muscles
You have seen how the cats and the dogs can wiggle their ears. Well, this is thanks to their ear muscles. We also have these muscles, but since we don’t need them (and nobody can really moves his/her ears like that) they are useless.
4. Wisdom teeth
In the past the wisdom teeth were useful while eating plants, but nowadays in most people they are causing just pain. So we just remove them (which is very expensive by the way).
5. Cervical rib (the neck)
It’s considered that it’s left over from the reptile ages. Nowadays there are people who still inherit this rib, but it only cause problems (artery or nerve problems).