The Science of Play

Play is a vital behavior that is homeostatically regulated, meaning that when animals or children are deprived of play, they will engage in it more intensely once given the chance. Pioneering research by Jaak revealed fascinating insights into the biology of play, including the concept of "rat laughter" and how various species, including kittens and puppies, express joy through laughter at ultrasonic frequencies. This understanding underscores the importance of play in maintaining balance in biological systems, similar to how hunger and thirst are regulated.