Researchers trained mice and monkeys to forage for targets in an immersive virtual environment. The animals' facial ...

In a study published in the journal Behavioural Processes last month, two US scientists counted 276 different facial expressions when domesticated cats interacted with one another.

Cats have 26 different facial movements that combine to make 276 distinct expressions, according to a new study. Olivia ZZ via Getty Images Cats can sometimes get a bad rap for being aloof or not ...

For their new study on facial expressions that occur "in the wild" (meaning outside a laboratory) Martinez and Srinivasan analyzed a dataset of approximately 7.2 million photographs of different ...