Most primate species have relatively large brains with surfaces marked by pronounced bulges and furrows. This is not the case with common marmosets (Callithrix jacchus). The brains of these small ...

Biologists, zoologists and psychologists have been trying to trace the origins of human language for centuries. One well-known theory, known as the social brain hypothesis, suggests that increasingly ...

Most primate species have a relatively large brain with a surface marked by pronounced bulges and furrows. This is not the case with common marmosets ...

Our understanding of female–male power relationships in animals has changed over time. Evolutionary biologists once thought that male mammals held clear-cut power over females. Later, species with ...

To show how monkeys think about math and shapes, scientists had them play games — including some designed by kids.

Is it true that male animals are dominant over females? Previous studies have often found male-biased power in primates and other mammals. A new study, investigating physical encounters between ...