Why the Latest Science Leads Us to a New Theory of Human Nature, by Jonathan Leaf (Bombardier, 320 pp., $21) Ever since Darwin, biologists have believed that much could be learned about human nature ...

Here's something that'll make your next giggle session feel a bit weird: scientists genuinely can't figure out if your laughter evolved from joyful chimp panting or from the threatening bared-teeth ...

Add Yahoo as a preferred source to see more of our stories on Google. Bonobos (Pan Paniscus) on a tree branch. The Swearing and Aggressive Bonobo ( Pan paniscus). Democratic Republic of Congo. Africa© ...

Mild aggression and lethal violence evolved separately, according to research across 100 primate species. The study ...

Add Yahoo as a preferred source to see more of our stories on Google. Nothing brings a group of primates together, humans included, quite like a threat from outside. Bonobos are unique among primates ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Punch, the seven-month-old Japanese macaque whose attachment to a stuffed orangutan toy has made him a viral sensation, ...

Now scientists report evidence that in nonhuman primates, same-gender sexual behavior plays an important role in the survival of individuals within certain species, helping them navigate harsh ...

Bonobos (Pan Paniscus) on a tree branch. The Swearing and Aggressive Bonobo ( Pan paniscus). Democratic Republic of Congo. Africa© Sergey Uryadnikov/Shutterstock.com For decades, scientists believed ...

Nothing brings a group of primates together, humans included, quite like a threat from outside. Bonobos are unique among primates because they do not kill other bonobos, even during conflicts with ...