Have you ever noticed two small holes on your back? These tiny indentations may seem insignificant at first glance, but they actually have a fascinating backstory. If you have these two holes on your back, you are really special.
The holes, called “pilomotor reflexes” or “Darwin’s tubercles,” are remnants of our evolutionary past. They are located on either side of the spine, just above the shoulder blades. In some people, they are more prominent than in others, but they are generally harmless.
So, what’s the purpose of these holes? In our distant past, when humans had a lot more hair on their bodies, these tiny indentations served as anchor points for our body hair. When the tiny muscles connected to the hair follicles contracted, they would cause the hairs to stand on end, creating an insulating layer of air that helped keep us warm.
Today, we don’t have much body hair, so these holes are no longer as functional as they once were. However, they do serve as a reminder of our evolutionary history.
Interestingly, not everyone has these holes. While they are present in most humans, they are not universal. In fact, some experts estimate that they are only present in about 10% of the population. This makes them a somewhat rare trait, and those who have them can consider themselves special in that regard.
While these holes may not have any practical purpose today, they are a fascinating reminder of our past. They are a physical manifestation of the ways in which we have evolved over time, adapting to our changing environment and circumstances.
So, if you have these two holes on your back, take a moment to appreciate them. They may seem small and insignificant, but they are a unique part of who you are and a testament to the incredible journey of human evolution.
