The animal kingdom is full of strange reproductive strategies, but when it comes to menopause, humans are among the weirdest. In just three species on the planet — humans, killer whales and pilot whales — do females routinely stop breeding years before the end of their lives. Human women spendRead More →

This Behind the Scenes article was provided to LiveScience in partnership with the National Science Foundation. Natural selection argues for small biological changes that yield greater chances of survival and successful reproduction. Yet, that process does not square well with the evolution of social insects, particularly when their colonies canRead More →