Having an extra finger can enable people to execute movements with a single hand that would otherwise require two. Photo courtesy of HealthDay News ============================================================== Though rare, some children are born with an extra finger, a condition known as polydactyly. Now, for the first time, a team of researchers set out to see whether having this extra appendage is somehow beneficial. The answer is yes. The bottom line: Having an additional finger significantly boosts a person's ability to manipulate objects, so much so that they can execute movements with a single hand that would otherwise require two. For the study,...