You might think you're ordinary—until your body reveals something evolution left behind. ️

Inside your wrist lies a clue to your ancient ancestry. A small muscle, once useful for climbing and gripping, still exists in many of us—but not all. This vestigial muscle tells a fascinating story of where we came from and how our bodies have changed with time.

✅ Lay your arm flat, palm up, and join your thumb and pinky
✅ A visible tendon in the middle of your wrist means you have the palmaris longus muscle
✅ This muscle was once used by mammals that walked on all fours
✅ About 10–15% of people don’t have it in one or both arms
✅ It serves little function today, making it a powerful sign of human evolution

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