Two Evolutionary Shifts Pushed Humans Toward a Right-Hand Bias
TL;DR
An Oxford study across 41 primate species finds that humans aren’t evolutionarily exceptional in handedness once brain size and limb proportions are included; a two-stage path links upright walking (freed hands) and later brain expansion to the strong right-hand bias (mean handedness index 0.76), suggesting the 90% right-handed world arose from changes in movement and brain growth rather than a single gene, with culture possibly reinforcing it.
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- The strange reason nearly all humans are right-handed The Brighter Side of News
- Study links right-handedness bias in humans to walking on 2 legs | Study published in PLOS Biology | Inshorts Inshorts
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