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In a Business Insider video, Neil deGrasse Tyson admits he has "unorthodox thoughts" on the matter of aliens. Where are they? The famed astrophysicist and host of StarTalk Radio poses the possibility that aliens already have visited Earth, but no one noticed. How would we know if we were walking among the masses of people in Times Square and we brushed shoulders with E.T.? But a more serious thought is that aliens may be more intelligent than humans are even able to comprehend. Think of it like this: A worm on the sidewalk is probably unaware that humans, these amazingly intelligent beings, are walking all around them on Earth. Are we the worms wriggling around at the feet of super-smart extraterrestrials?

Who doesn't want to know if we're all alone in the universe? If we are in fact not alone (the chances against which are microscopically tiny), then that means there are other places in the universe that can host life. The possibilities of what to do with that knowledge is virtually limitless.

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