Gorillas giggle and mice let out high-pitched chirps when they're tickled, according to earlier research that led scientists to conclude there's a primal form of laughter shared among species that played a key role in the development of communication. A team led by Marina Davila-Ross from the University of Portsmouth has broadened the study of laughter, with the help of YouTube videos that show how a wide variety of species react when tickled.

Full Story:

Related Summaries