These 30 Remarkable Body Features Are Very Rare…and Fascinating

But just because the tendon is vestigial doesn’t mean it’s totally useless in today’s world!

via GIPHY

The palmaris longus can be used as a donor tendon in the event that a person needs a tendon graft.

Very cool, right?

Are you tetrachromatic?

The word might be a mouthful, but it’s a pretty simple concept.

Tetrachromatics have a fourth type of cone cell in their eyes.