Why Do Humans Have External Ears?
Although it may not appear to be significant, the external ear serves a purpose in the human body. Interestingly, humans have the ability to hear even without this external feature. In contrast, many other mammals rely on their external ears to work as a satellite dish, which helps amplify and carry sound through their ears. This is why animals such as dogs, cats, and horses have the ability to rotate their ears. However, over time, humans have evolved and no longer require external ears, making them incapable of moving them. Nevertheless, individuals who possess the unique ability to wiggle their ears still retain some remnants of this ancient function.
Palmaris Longus Muscle
The palmaris longus muscle, often considered an unnecessary body part, displays a startling prevalence of absence in approximately ten percent of individuals. Extending from the wrist to the elbow, this slender muscle is believed to contribute to enhancing grip strength. While tree-dwelling creatures such as monkeys and lemurs possess this muscle, it serves no discernible purpose in humans. Interestingly, during reconstructive surgeries, it is frequently utilized as a source for replacing damaged tendons in various areas of the body.