Hair-pulling, poking... and laughter: apes like to playfully tease each other

Researchers said this study is the first to systematically document and analyse playful teasing in primates

Scientists say great apes such as chimpanzees have a sense of humour (Danny Lawson/PA)

Great apes — just like humans — playfully tease each other, scientists have found.

An international team of researchers analysed videos of four species: chimpanzees, bonobos, gorillas and orangutans.