Noted: When this research first came to light last year, University of Wisconsin anthropologist John Hawks cautioned against reading too much into fossilized fingers. He said the index-to-ring ratio “may be correlated with mating system in primates, but that doesn?t mean it?s a good predictor of mating system. … As fossil hominins go, I wouldn?t expect the story to go any further — there just aren?t many hands, so there?s never going to be a significantly predictive result.”