Why do some species of birds-of-paradise have such eye-catching plumage?
Male humans try and attract potential mates by your pectorals, the stretch of your Ferrari, and the mass of your bank account, but Turkeys like long snoods...
Have you ever stopped to wonder why sex and violence so often go hand in hand?
Did you know that electric fish use electricity instead of light and sound to find their way and talk to each other? Find out more on this Moment of Science.