When women do find something to be genuinely funny, they feel rewarded in a way that men don't.
If you have a dog, you may have noticed that sometimes it seems to be smiling. Of course, we know that dogs don't really smile, right?
Do old folks still appreciate humor? Find out on this Moment of Science.
Their ratings were also not changed by being given unrealistic cues, such as the claim that these jokes were the funniest jokes ever told.
Laughter research has found that less than 20% of laughter is a sincere response to someone's humor. In fact, it's primarily a social signal.