Scientists have long focused on quantifying fear and other negative emotions in animals. Now they’re trying to measure ...

It was always a joy to watch those laughing, giggling and fighting animals in cartoon films. Of course, a lot of their ...

Research on joy—those bursts of “woo-hoo moments”—is an exciting area of study across species. But the feeling of too much ...

A tour guide goes one step beyond, a macaw on the Q and more reader tales of New York City in this week’s Metropolitan Diary.

Rats do not simply drift through vague, sleepy fog. Their brains light up with detailed replays of the day, from sprinting ...

A Secret Service study concluded that school shootings are preventable if officials pay attention to warning signs. The agency’s National Threats Assessment Center analyzed 67 thwarted school attacks ...

Brutal mob boss James “Whitey” Bulger was a colorful figure in the underground crime word. So it’s no surprise his trial prompted some memorable quotes: “After I heard that they were informants, it ...