What every cat owner knows, even without knowing

Now we know for sure that cats manipulate their owners. We knew it before, but Not Exactly Rocket Science has the data.

Too lazy to click on the link? Or -- let me guess -- is Hecate or Horatio lying on the mouse? Here's how cats tell you they're hungry.

Apparently you cannot hear this with your unassisted ear, but a hunger cry is hidden in an apparently otherwise standard purr. Recorded properly, it can be played back and separated out from the standard purring sounds, and when that's done it sounds like the cry of a human baby. How on earth did that evolve?