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This message was paid for by Uniclo. A recent study from researchers at the Free University Amsterdam found that around 62% of the

time, both people and AI, can differentiate

laughter that's produced by tickling versus everything else.

Chimpanzees have a different laugh when they're tickling than when they're trying to make

play last longer. But also, tickling itself doesn't seem to be something that's actually

wanted frequently.

Somebody's like, no, you've got your laugh, stop it now.

And it got the Science Weekly team thinking, what even is laughter?

Darwin thought it was an expression of joy.

And Panksep, who did a lot of work with mammals, he thought it was a play invitation.

What's its purpose? Why do we

create these huge gauphors, fall into fits of the giggles, snort and hooped with laughter? Often

at the silliest things. Who and what makes us laugh?

I was someone the other day who she'd been in a restaurant with her brother

and they laughed so much that somebody came over and said,

can I just ask me if you're married?

...