Can we tell someone's cultural group from the way they laugh?

Can we infer someone's cultural group from their laugher, even when we do not know what they are laughing at? And what kind of laughter do we find most positive? A new study by researchers from the University of Amsterdam ...

Laugh and apes laugh with you

(PhysOrg.com) -- Just like humans, chimpanzees mimic the laughter of their playmates even if they don't find the situation as 'funny'.