Have your say: Do you believe in aliens and have you ever seen a UFO?
dailystar.co.ukStephen Hawking, known to be one of the greatest geniuses of our time, warned us to be careful what we wished for in our quest to make contact with aliens.He said: “Meeting an advanced civilization could be like Native Americans encountering Columbus.
That didn’t turn out so well.”But some sceptics argue that the reason why we haven’t found aliens yet is simply because they don’t exist, and even if they did, they might not be the intelligent beings we imagine them to be.If they do exist, they might be tiny, microscopic organisms floating around in alien oceans somewhere under the surface of a moon billions of light years away.Then again, there are also several fringe conspiracy theorists who believe everything about space is one big hoax and nothing exists beyond our planet and its immediate atmosphere. Want the latest updates on close encounters, mysterious sightings and fascinating insights from scientists ?
Sign up to the Daily Star's Spaced Out newsletter HERE. Let us know what you think in the comments. Others, on the other hand, argue that aliens already exist among us on Earth, but are simply in hiding, or in disguise.
Astronomer Jacques Vallée, who co-developed the first computerised map of Mars for NASA in 1963, is one of many experts touting the interdimensional hypothesis, which suggests that aliens may exist in other "realities" or "dimensions" parallel to our own.Another theory is that aliens once existed, but went extinct either due to factors like climate change.
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