Scientists think they’ve cracked the mystery of human right-handedness

One of the biggest mysteries in human evolution has long puzzled scientists: Why are humans so overwhelmingly right-handed? Around 90% of people across cultures prefer using their right hand, a level of dominance not seen in any other primate species. Researchers have spent decades studying the brain, genetics, and development behind handedness, but the reason humans became so strongly right-handed has remained unclear.

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