Get a load of this: Humans and great apes share similar giggles StuffHumans and great apes show similar ways of laughing MSNRhythm and timing in laughter reveal that human vocal plasticity falls on a hominid continuum | Communications Biology NatureScientists Tickled Gorillas And Found A 15-Million-Year-Old Clue To How Humans Learned Speech ForbesTo Reveal the Rhythmic Roots of Laughter, Just Tickle an Ape The New York Times
