wanted to use this link to work out whether being anxious (and so scratching a lot) made their monkey subjects more pessimistic, or whether their pessimism was what drove their anxiety (and their ...

Scientists Sakumi Iki and Ikuma Adachi recently spent a lot of time watching monkeys scratch themselves. Self-scratching among non-human primates is known to indicate social tension and anxiety.

In 2021, a female white-handed gibbon became pregnant, confusing Japanese zookeepers who believed a male money had never ...