According to UFO enthusiasts, cattle mutilations are the work of aliens gathering the organs and tissues of the earth's dumbest creatures so that they can run nefarious experiments. Apparently, this sort of thing happens thousands, if not millions of times each year in North America alone. The UFO enthusiasts, always eager to make their crackpot beliefs appear scientific, have even come up with a fancy name for it: Mutology, the study of animal mutilations.The basic story runs like this: a farmer comes out to the pastures, where he finds a couple of his cows have been killed. But not just killed - they've been torn apart! Some of their organs or genitals have been removed, and some UFO enthusiasts go so far as to claim they've been sprayed with luminescent paint, used to identify them in the dark.So, it's simply a case of organ harvesting by beings from beyond, right? Not quite. Like all things paranormal in nature, there's no such thing as a simple definition. Some cattle are found dead with no apparent cause of death, not a single mark on their bodies. Others are found torn to ribbons. Sometimes it's the tongues, genitals, specific organs, muscle tissue, skin, eyes, hooves...basically, the aliens have a long, long shopping list. What it comes down to is this: if your cattle is dead, no matter what happened to it, it can be construed as an alien cattle mutilation.Surely, you say, there must be some evidence to support this crazy ass theory. There is. Here's the UFO enthusiasts' argument that aliens are killing our cattle, in it's entirety: since we can't prove that they're not doing it, they must be doing it. That's it. That's as complicated as it gets. The argument that there are solely natural forces at work, explanations that require no beings from other planets, is a lot better.