Our bodies are truly incredible, yet we rarely appreciate the marvel of evolution they represent. Humans have evolved from primates into complex, society-building beings—yet biologically, we’re nearly identical to our ancestors from 20,000 years ago.
While evolution continues, it moves so gradually that we hardly notice. A great example? The palmaris longus tendon in your wrist. This muscle, vital for tree-dwelling primates, has been disappearing in humans—about 10-15% of people no longer have it. Want to check yours? Rest your forearm palm-up, touch your pinky to your thumb, and lift your hand slightly. If a tendon pops up in the middle of your wrist, you have it! If not, you’re among those evolving away from it. Did you find yours?