| True ambidexterity is the ability to use one's left and right hands equally well when it comes to tasks such as writing or throwing a ball. This rare trait naturally occurs in roughly 1% of the global population (around 82 million people). In a 2019 study, 1.7% of respondents said they could use both hands interchangeably, far fewer than the 89% who were right-handed and the 9.3% who were lefties. The study also found a higher predisposition for ambidexterity among males than females (2.1% and 1.4%, respectively), which some theorize may have to do with the effect higher testosterone levels have on brain development (though this has yet to be conclusively proved). This is just one of several studies on handedness — the tendency to use one hand over another — and while the exact percentages of right-handed, left-handed, and ambidextrous people vary, the results are largely consistent across the board. The root cause of ambidexterity — or any handedness, for that matter — remains tough to pin down. One 2009 study suggests it may be determined by a combination of genetics and environmental influences (for instance, being taught to write with a certain hand in school). It's also believed that ambidextrous people possess atypical brain laterality compared to right-handed individuals, which forms during development. This cerebral asymmetry is arguably why ambidextrous people have a higher propensity toward conditions including ADHD, and also why they generally are less proficient than right-handed people in topics such as arithmetic and logical reasoning. Ambidextrous people also possess a unique versatility when it comes to sports, playing music, or performing everyday physical activities. | 
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