Great apes have been laughing with the same

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Great apes have been laughing with the same rhythmic structure as modern humans for at least 15 million years, a new study reveals. While our laughter became faster and more consciously controlled over time, this shared primitive rhythm provides a rare window into how human speech evolved.
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Rhythm and timing in laughter reveal that human vocal plasticity falls on a hominid continuum - Communications Biology

Comparative analysis of laughter rhythm across all extant great apes reveals that isochrony is ancestral to hominids, with tempo, variability, and context-sensitivity increasing progressively toward humans, tracing a continuum of vocal plasticity.

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Great apes have been laughing with the same rhythmic…

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