The "aliens are flesh-eating monsters from outer space" theory makes sense

The recent theory posited by a former government electrical engineer that our alien visitors are advanced insects that feed on human and animal blood actually makes a lot of sense, when you really think hard about it. Also, discussing the theory is not a form of "fear porn," as some contend. It is simply another theory that speculates about possible reasons for the extraterrestrial presence on Earth.
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Link to History Channel article: The Mysterious History of Cattle Mutilation - HISTORY