Place your forearm on a table, palm up.
Touch your little finger with your thumb while slightly lifting your hand.
If a band appears in the center of your wrist, you have inherited this ancient tendon. If nothing appears, your body is reflecting an ongoing adaptation.
Why are we losing certain traits?
A legacy from arboreal primates.
Our ancestors, like lemurs and some monkeys, used this muscle to climb and move through the trees. Over time, humans and terrestrial primates, like gorillas, abandoned this unnecessary function. Today, about 10 to 15% of humans no longer have this tendon, marking a turning point in our evolution.
A body that adapts to the modern lifestyle.
Like the palmaris Longus, other vestigial characteristics testify to our adaptation:
Goosebumps, once used to retain heat or intimidate predators, are now unnecessary.
Wisdom teeth, essential for our prehistoric ancestors, are becoming increasingly rare in younger generations.
Fascinating evidence of evolution:
Our bodies continue to evolve, sometimes imperceptibly. Every vestigial trait, like this tendon or our physiological reflexes, tells a story of survival, adaptation, and transformation.
A look at the future of humanity
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