When biologists study cooperation in animals, they usually offer just a single task at a time. But what happens when animals ...

People with health anxiety tend to get tangled up in problematic behaviors, such as reassurance-seeking, excessive body checking and avoidance. These behaviors act like a vortex, sucking you into that ...

A meadow grasshopper (Pseudochorthippus parallelus). This species is widespread across most of Europe and is commonly used as a model organism in evolutionary biology. If an experiment is repeated ...

How witnessing aggression might affect behavior ...