Space Rocks Falling.

The odds that a potentially devastating space rock will hit Earth this century may be as high as one in 10.
An object falling from the sky only 300 meters wide could release as much energy as 1000 nuclear bombs. But even scarier, it turns out not all "space objects" leave craters. WTF? How could we not have known that earlier. Which leads to this scary revelation:

"A generation ago, the standard assumption was that a dangerous object would strike Earth perhaps once in a million years. By the mid-1990s, researchers began to say that the threat was greater: perhaps a strike every 300,000 years. This winter, I asked William Ailor, an asteroid specialist, what he thought the risk was. Ailor’s answer: a one-in-10 chance per century of a dangerous space-object strike." (the atlantic)

Maybe Chicken Little was right all along. We're sorry we ever doubted you!