When a duo becomes a trio, emotional bonds shift—and one friend often ends up feeling left out. Friendships lack clear rules, ...

Researchers peered inside the brains of huntsman and crab spiders using microCT scanners and found that while spiders' brains ...

In a type of relationship known as mutualism, two different species benefit from one another through cooperation. While some ...

Birds can seem amazingly social as they fly and roost together. But why do they really hang out? Let’s take a closer look at the social lives of birds.

Humans and bees share genetic traits responsible for social behavior, suggesting that the basic elements of connection transcend species.