Sexual SelectionAll behavior has to pass the test of natural selection. However, sexual selection can override traits that would normally be selected for through natural selection. Sexual selection...

Physiology and endocrinology have big roles in regulating behavior. Hello, hormones, take me to prom? We’ll get to that in a minute. Hormones and physiology make animals do things. They make us h...

Hormones are responsible for a lot of important things inside the body, like regulating digestion, sleep patterns, and mood. They also are at the root of a lot of behavior. As we said earlier, find...