David Frayer, an anthropology professor at the University of Kanas, did a study on how right-handedness goes back more than 500,000 years. His research found that distinctive markings on fossilized teeth show correlation to the right and left-handedness of prehistoric humans.
The finds of the oldest teeth come from more than 500,000 year-old chamber that is know as Sima de los Huesos. The fossilized teeth are believed to be remains of humans and ancestors of European Neandertals. Frayer and his co-authors did studies that found that 93.1 percent of the humans at Sima de los Huesos were right handed.
Frayer said that these findings of right-handedness make implications for understanding and learning the capacity of ancient populations. Language is located primarily on the left side of the brain, which controls the right side of the body; so therefore, there is a right handedness-language connection.From these findings, Frayer found out that at least half a million years ago the patterns between correlation of right-handedness has not changed.
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