Male topi antelopes lie about predators to keep the ladies nearby.

Researchers get a better understanding of how mice smell a rat, or a cat, and maybe even a snake.

Reactions of chimps to dead companions and infants suggest a basic realization of what death entails.

Most adolescents need at least eight hours of zzzzz’s a night, studies show, and ideally should garner at least nine. A new study tells us just how many kids meet their slumber quota: a whopping 7.6 percent.