Add Yahoo as a preferred source to see more of our stories on Google. A male hourglass tree frog (Dendropsophus ebraccatus) with an inflated vocal sac used to produce calls. Your taste in music may ...

Plants and animals have evolved all sorts of ways to make themselves more appealing to potential mates—including colorful feet, flamboyant feathers, complex mating dances and sexual deception. Many ...

Humans don’t have a defined mating season like deer or wolves. Here’s how evolution rewired our reproduction by blending biology, culture and social life into year-round intimacy. Unlike the rut of ...