Specialised foraging skills could have made the essential difference
If expectant mothers are exposed to stress their child can develop behavioural problems - but this is less often the case for children with siblings
Bigger brains have led some species of parrot to live surprisingly long lives, new research shows
Researchers are investigating the cognitive abilities that allow animals to react to a rapidly changing environment
Long-term study shows that maternal loss is stressful for immature orphan wild chimpanzees - but only for the first couple of years
Researchers spent months observing groups of southern pig-tailed macaques
In the Bolivian Tsimané, who supports who is affected by physical size, social status, and existing cooperative and antagonistic relationships
Max Planck Institute for Evolutionary Anthropology
Deutscher Platz 6 04103 Leipzig e-mail: eco_sec@eva.mpg.de
