A new study reports that a small knee bone that was less prevalent 100 years ago is making a comeback. Called the fabella (“little bean” in Latin), it can be found buried among the tendons in the back of your knee. A sesamoid bone, it is believed the fabella develops as a means to reduce tendon friction, though biologists have yet to study it closely. It is also associated with arthritis.
100 years ago fabellas could be found in about 10 percent of the population. Now researches say almost 40 percent of us have one, most likely because of improved nutrition and greater average heights. More