The fabella, a small bone in a tendon behind the knee, was lost over the course of early human evolution, but these days it’s becoming more common, according to a study published this week (April 17) ...

This means some mammals may have sesamoid bones when even members of the same species don't. One such example is the lateral fabella, which is behind the knee and can be found in an average of 36. ...

Other scientists have reported sites in Eurasia and northern Africa with either hominin fossils, stone tools or butchered animal bones from around this time. Our recently published research adds ...