Scientists think there are a number of reasons why young animals leave home. By doing so, they avoid competing with their relatives for resources.
Dolphins have evolved to live in an aquatic environment, and like bats, they can use sonar to locate prey by emitting different frequencies of sounds.
Imagine you're a female cardinal and you're looking for a mate. Before you are three males. Which one should you choose?
In most species of social insects, such as wasps, bees, and ants, the females rule. The females are the workers.