Newborns may seem tiny to their adoring moms and dads, but most other primate parents would disagree.
Firstly, insects cannot be part of a vegan diet and are probably the key source of B12 in most primate diets.
Dr. de Waal, a primatologist, has long studied the cooperative side of primate behavior and believes that aggression, which he has also studied, is often overrated as a human motivation.
Such advances have led to a drop in primate research.
It's possible that aversion to red evolved more than once across primate species, including humans.
Removing the Irish primate, who has said he will only go if the Pope requests it, could signal that the era of cover-ups is finally over.
The primate version of the virus that causes AIDS is called simian immunodeficiency virus (SIV), but most apes and monkeys that are infected with it show no symptoms of illness.
Scientists had believed that this birth position evolved in the primate ancestors of modern humans.
But the new study found that 70 percent of rodent and primate groups have species with an appendix.
After a moment or two, the group stopped looking my way, recognizing me for the strange hairless primate they had grown accustomed to seeing amid the other mountain fauna.
So far, efforts to clone a monkey or another primate with the same techniques have failed.
Early humans may have evolved as prey animals rather than as predators, suggest the remains of our prehistoric primate ancestors that were devoured by hungry birds and carnivorous mammals.
The most likely theory is that it stems from primate mothers passing along chewed food to their toothless babies.
Humans aren't the only primate with NK cells.
Nim's life story is told in Project Nim, a new documentary by Man on Wire director James Marsh, described by the New York Times as a "probing, unsettling study of primate behaviour".
The next step, Rekers said, is to study other primate species, such as bonobos.
That lemurs can learn socially like their distant primate relatives, including apes and humans, suggests they possess an underpinning to human-like culture.
Among primate and nonprimate species, the degree of polygyny highly correlates with the degree to which males of a species are larger than females.
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