A recent study into same-sex behavior in primates finds that social organization and ecological factors, including climatic conditions, influence this behavior. In gorilla groups, same-sex relations ...

Humans are far from the only primates engaging in same-sex sexual activity. A new study found instances in which 59 nonhuman primate species, including bonobos, chimpanzees and macaques, have taken ...

A group of monkeys is challenging humans’ views on sexuality by showing that same-sex behavior among males strengthens their social networks and may even help them father more offspring. The findings, ...

Observations of a wild colony of macaques over three years show same-sex sexual behavior among males is widespread and may be beneficial. The results, published today in Nature Ecology and Evolution, ...

Jane Goodall, whose lifelong work as a primatologist helped broaden the world’s understanding of animal behavior and emotions, has died, her institute said Wednesday. She was 91. Her field studies ...

Kissing may date back 21.5 million years in early ape ancestors Researchers studied modern primates to estimate how the behavior evolved Kissing is not universal today and only 46% of cultures ...

Crying is one of the most recognizable human emotional signals. Tears appear when people experience grief, relief, joy, or deep stress. Because this response is so familiar, observers often assume ...

Collection methods and diagnostic procedures for primate parasitology / Ellis C. Greiner and Antoinette McIntosh -- Methods of collection and identification of minute nematodes from the feces of ...