90% of People Are Right-Handed. New Study Tells Us Why

Μake us preferred on GoogleWhy do nearly nine out of ten people rely mainly on their right hand? The answer isn’t found in habit or upbringing, but deep within human evolution. This preference for the right hand grew stronger in later species, including Homo ergaster, Homo erectus, and Neanderthals, eventually becoming nearly universal in modern humans. Researchers found that this species had a smaller brain and a much weaker preference for the right hand. Then, brain evolution enabled more complex motor functions and cemented the preference for using the right hand.