This Tiny Knee Bone Had Nearly Vanished As Humans Evolved. It's Coming Back
A tiny bone hidden in the tendon of the knee started to disappear over the course of human evolution ... or so scientists thought.
Now, a new study finds that this so-called fabella (Latin for "little bean") is making a comeback. The bone, which is a sesamoid bone, or one that's embedded in tendons, is three times more common in humans now than it was a century ago, scientists reported Wednesday (April 17) in the Journal of Anatomy.
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