Lefties:Righties -- 1:9 https://www.popsci.com/story/science/left-handed-weird-evolution/
>>Lefties are an oddity among humans. Only about 1 in 9 of us use that hand, but my research on primates has found that in bonobos and chimps, the split is more even: About 1 in 3 default left. For orangutans, 2 in 3 individuals are left-handed.
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@estherschindler three of my five siblings are lefties. That’s rather rare, back in the 70s Mum participated in some (inconclusive) university tests on the matter.