Researchers from Leiden University are working with Ouwehands Zoo to improve our understanding of emotions and intelligence in orangutans. Visitors to the zoo can now watch orangutans as they play with computer touch screens.

Humans and bonobos show striking similarities as well as differences when they see pictures of conspecifics. Both are more interested in photos of conspecifics that show emotion. But while our human attention is more easily drawn to photos of family members and friends that express certain emotions,…

For the first time, contagious yawning has now also been found in a species that roams its territory mostly in solitude and is less frequently engaged in social interactions: the orangutan. Publication in Nature Scientific Reports by an international group of scientists with lead-author Evy van Berlo,…

Neuropsychologist Mariska Kret is through to the next round in the 2016 Science Talent contest organised by New Scientist magazine.

It is important for social animals to be able to recognise one another quickly. Humans are able to recognise each other immediately from their faces. Faces are also important for chimpanzees, but a new study by neuropsychologist Mariska Kret in PLOS ONE shows that the animals' buttocks also play a…

Bonobos – just like humans – pay more attention to pictures that show other members of their species displaying emotional behaviour than to neutral scenes. Leiden researcher Dr Mariska Kret made this discovery while conducting research at Apenheul Primate Park.

Aesthetic attraction plays a big role in orangutans’ mate choice, behavioural biologist and PhD candidate Tom Roth has observed. But to discover just how big that role is, more research is needed into the emotions of the great apes.