Over time, our bodies have changed in order to adapt to the environment. This is called evolution. Although most humans look pretty much the same, there are some subtle differences in our bodies that are proof of evolution.
The way evolution works is simple: the things that our ancestors no longer use, they stop passing it to newer generations. Which is why we don’t have the same teeth now that hunters did back in the day.
If you are interested in seeing proof of evolution try out this experiment. Place your arm on a flat surface and having your thumb and pinky fingers touch each other.
Now tip your hand slightly up. One of two things will happen. You will either have a smooth and flat forearm or have a raised band appear. That is a tendon that 10-15 percent of people don’t have on one or both of their arms.