'Pointless' rare knee bone makes evolutionary comeback in humans

A small knee bone with "no apparent function", which evolution appeared to have discarded, has made a surprising comeback.The fabella, described as the "appendix of the skeleton", is buried in a tendon behind the knee and acted as a kneecap in Old World monkeys.Scientists from Imperial College London (ICL) examined 21,000 knee studies from 27 countries spanning 150 years.