Chimpanzees engage in polite laughter, UK scientists claim
Chimpanzees mimic the laughter of their playmates even if they do not find the situation as funny, scientists said.
Research by Dr Marina Davila-Ross, of the University of Portsmouth, has shown that the animals do not just 'ape' the expressions of their social partners.
The psychologist said the chimpanzees appeared to use laughter to strengthen social bonds, just like humans.
