If You Have This Arm Tendon, Here’s What It Means

But one really extraordinary hint of evolution is actually found within our arms. In our tendons, to be specific. There is a tendon that 10 – 15% of our human population has evolved out of, hinting to scientists that we humans are nowhere close to being finished with evolution. This tendon is attached to an ancient muscle called the palmaris longus, which was primarily used by tree-dwelling apes (lemurs and monkeys, for instance) to help them move from branch to branch. Humans and ground-central apes, like gorillas, no longer have a need for this muscle or tendon, so both species have started to lose this internal function.

 

However, evolution is a slow-going process, so almost 90% of humans still have this useless trait carried down from our monkey ancestors.

To see if you have the tendon, lay your forearm down on a table, palm up. Touch your pinky to your thumb and lift your hand just a little off the surface. If you see a raised band in the middle of your wrist, you have the tendon connected to your still-intact palmaris longus.

If you don’t – congrats, you’re evolving.

Whether you have this tendon or not is extremely cool; having this tendon means that you have a link to our ancestral past right there in your body, and not having the tendon means that you are physical proof of further human evolution.

Is your mind blown yet?

What do you think of these cool evolutionary facts? Do you have this arm tendon or not? Share your thoughts in the comments section below.

Video From : Vox

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