![](/sites/default/files/styles/large/public/events/bill_hartston_event_photo_0.png.jpg?itok=XrvbYNAz)
Knock, knock! In pursuit of a grand unified theory of humour
Humour comes in many forms, from slapstick to sarcasm to knock knock jokes. Author and humourist William Hartston explained them all in this talk about what makes us laugh and why.
Find out more