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- Oo oo, ha ha: why humans and great apes giggle alike when tickled Nature
- To Reveal the Rhythmic Roots of Laughter, Just Tickle an Ape The New York Times
- Rhythm and timing in laughter reveal that human vocal plasticity falls on a hominid continuum | Communications Biology Nature
- Get a load of this: Humans and great apes share similar giggles AP News
- What an ape’s laugh can teach us about human language Yahoo