Our bodies are extraordinary creations—so remarkable, in fact, that many of us rarely stop to appreciate the incredible journey of evolution they represent.
Consider this: humans have evolved from creatures similar to modern-day chimpanzees into beings capable of building complex societies, designing advanced technologies, and even sending spacecraft to other planets. All this has occurred in what feels like an instant when viewed against the vast timeline of the universe.
Yet one of the most intriguing aspects of our evolution is how little our biology has changed over the last 20,000 years, even as the world around us has transformed dramatically.
Even more fascinating? Evolution is still happening. Although it occurs so gradually—over countless generations—we rarely notice its effects. However, there are clues if we know where to look. One such clue lies in a seemingly insignificant tendon in your wrist, offering a glimpse into our evolutionary journey and what lies ahead.
The Wrist Tendon and Evolution
The tendon in question is linked to an ancient muscle called the palmaris longus. Today, this tendon is absent in about 10-15% of the human population—a subtle sign of how our species continues to evolve.
Research suggests the palmaris longus is crucial for animals that rely on their forearms for movement, like monkeys and lemurs. For example, this muscle helps them swing gracefully from branch to branch, making it an essential part of their anatomy.
Interestingly, ground-dwelling apes, such as gorillas, have largely lost the function of the palmaris longus since they no longer depend on their forearms for locomotion. Similarly, humans—who no longer rely on swinging through trees—are gradually losing the tendon attached to this muscle.
Although evolution is a slow process, approximately 90% of people today still have the tendon. However, evidence suggests it is being phased out over time as it becomes less necessary.
How to Check for the Tendon
Curious if you still have this evolutionary remnant? You can perform a simple test at home:
- Place your forearm on a flat surface, palm facing up.
- Touch your pinky finger to your thumb.
- Slightly lift your hand off the surface.
If you see a distinct band in the middle of your wrist, that’s the tendon! If you don’t, you may belong to the small percentage of humans who no longer have it.
What Did You Find?
Did you discover the tendon in your wrist? Let us know in the comments! And don’t forget to share this article with your friends and family—who knows, it might spark a fun conversation about the fascinating ways we’re still evolving.
Post a Comment