How Bomb-sniffing Dogs Work

When the phone rang one morning in 1972 at Trans World Airlines' New York City headquarters, the caller on the other end delivered a bomb threat. The anonymous party demanded $2 million, to be tucked into duffel bags in JFK airport lockers, or else four TWA planes would blow up soon. See more

What Are Moonmoons?

If planets can have moons, could those moons have moons of their own? After all, some moons in our solar system — Jupiter's moon Ganymede and Saturn's moon Titan — are actually bigger than Mercury, the smallest of the eight planets recognized by the International Astronomical Union. See More

Knowing Your Tendency Helps You Conquer Life Goals

What Does It Really Mean to be a 'Nationalist'?

Are You a U.S. History Expert?

Americans typically learn about Washington crossing the Delaware and other key events from the American saga in school. Find out how much you really know about the details of U.S. history by taking this quiz. See More >>>