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Do Aliens Exist?
Alien life has existed or does exist.
Scientific theories support the existence of alien life.
The resilient and adaptable nature of life suggests that life can thrive under conditions other than found on Earth.
that there are too many planets that could support life for there to have never been alien life.
The creation of life by chance may well be such a fantastically improbable event that it has happened only once.
There is no valid and clear evidence for the existence of alien life.
In Case Aliens Exist: Should We Say Hello?
Are crop circles created by extraterrestials?
What is the best reaction to an alien encounter ?