Evolutionary biologists have long hypothesized that the short-term physiological responses to stress help animals survive in ...

A UCLA-led team of researchers used the environmental circumstances and fecal samples collected from the six years prior to the severe El Niño drought in Costa Rica to study the relationship between ...

A study by the universities of Manchester and Liverpool observing monkeys has found that those in the middle hierarchy suffer the most social stress. Their work suggests that the source of this stress ...

"We wanted to understand how the stress response adaptively helps these ... of white-faced capuchins at the Lomas Barbudal Capuchin Monkey Project in Guanacaste, Costa Rica. In Guanacaste, Perry ...