Why can’t we stop laughing once we start?
Oct 20, 2026 · 4m
Summary
Professor Sophie Scott discusses the evolutionary roots of laughter, noting it is shared by apes and rats as a bonding mechanism during play. She explains that laughter serves as an invitation to play, crucial for developing mammal brains, and distinguishes between voluntary social laughter and involuntary, uncontrollable bursts. The segment also explores how depression may reduce laughter by diminishing the sense of connection and joy typically associated with it.
Topics discussed
Sherwin-Williams Super Sale advertisement
Introduction to Sophie Scott and the topic of laughter
Laughter in apes: chimpanzees and gorillas
Laughter analogues in rats and other animals
Rat play-fighting and tickling behaviors
Evolutionary role of laughter in bonding
Importance of play for brain development
Involuntary laughter and neural control
Voluntary vs involuntary laughter mechanisms
Human perception of laughter frequency
Laughter and depression research
Closing remarks and contact information
Sherwin-Williams Super Sale advertisement
Listen ad-free on Castria