Researchers who study human hand preference agree that the side of the preferred hand (right versus left) is produced by biological and, most likely, genetic causes.

Common Variants in Left/Right Asymmetry Genes and Pathways Are Associated with Relative Hand Skill. PLoS Genetics , 2013; 9 (9): e1003751 DOI: 10.1371/journal.pgen.1003751 Cite This Page : ...

Other left-right asymmetries abound in human biology. Perhaps the most striking is the asymmetrical layout of our internal organs—heart, lungs and digestive track.

That fits with observations showing that in 90 percent of righties, the left half of the brain—which controls their dominant hand—also houses regions specialized for speech.

Modern neuro-imaging confirms that, for most human beings, the left-handed hemisphere of our lateralised brains became home to our language-processing centre.

The discovery of a little finger of a left hand of an unknown human ancestor was found in the famous Olduvai Gorge in Tanzania. It dates back least 1.84 million years, ...

Human Evolution Human evolution: Facts about the past 300,000 years of Homo sapiens Human Evolution 'Huge surprise' reveals how some humans left Africa 50,000 years ago ...

ARE you right or left-handed? Chances are you know which camp you belong to, and the chances are also good that, like 90 per cent of the human population, you consider yourself to be right-handed.