Evolutionary biologists have long hypothesized that the short-term physiological responses to stress help animals survive in life-threatening situations. Indeed, research shows that the canonical ...

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 ...

Maternal stress hormone levels during early pregnancy can have a lasting effect on the stress system of the offspring. The results of a long-term study on wild Assamese macaques in Thailand indicate ...

Another key aspect of the research was noting where the observed monkey ranked in the social hierarchy of the group. The researchers found that monkeys from the middle order had the highest recorded ...

"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 ...