Do you write with your right hand? Scientists think they know why

Scientists may have finally unravelled the long-standing mystery as to why more than 90 per cent of humans are right-handed. Researchers examined hand preferences across 2,000 individuals in 41 different primate species to reach their conclusions. Two key factors emerged as the primary drivers of handedness - brain size and limb length. The study revealed that as our ancestors developed larger brains over millions of years, their tendency towards right-handedness grew. Genetic factors largely de