Bipedalism and brain expansion explain human handedness.

PLoS Biol · 2026 · PMC13138751 · PMID 42044164

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a clear trendno p-value reported

When using the reduced model including humans to predict hominin MHI values we found a clear trend of increasing MHI from older to more recent hominin species ( Fig 4 ): Ardipithecus ramidus (0.16), Australopithecus afarensis (0.32), Homo ergaster (0.50), Homo erectus (0.54), and Homo neanderthalensis (0.64).

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