The theory that there are aliens among us has recently gained a little more credibility. Well, at least it has gained a proponent who is more credible than the cranks often associated with such theories.
Bulgarian astrophysicist Latchezar Filipov believes that there are aliens living on our planet, though they are (somehow) invisible to us. That doesn't mean we can't see their effects, though, he claims. Crop circles are one way they communicate with us. And what they are saying is that they aren't happy with us, particularly for the issue of global warming.
It's interesting when theories like this begin to be more accepted by mainstream thinkers. If it becomes accepted as fact, I guess science fiction writers will have one less "what if" to treat. Though, I am sure that means it will open up plenty more options to take its place.
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