Although we know that right and left-handed people have co-existed since the Upper Palaeolithic era (15–10,000 BC), little is known about the distribution of left-handedness or why the trait persists. While scientists believe handedness is mostly inherited, it is not so clear what the evolutionary advantages associated with being left-handed are. A new study recently published in Proceeding of the Royal Society (Biological Sciences) may offer a piece of the puzzle.
Researchers Charlotte Faurie and Michel Raymond of University Montpellier in France claim that there is a strong, positive correlation between the frequency of left-handers and the rate of murder in traditional societies ... Felix On-line
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