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Originally posted by kindred
There is no evidence or proof whatsoever that aliens are visiting this planet and that's 100% the truth. Anyone who believes otherwise, please provide proof or hard evidence?
Originally posted by Yarcofin
NO ONE can be 100% sure that Earth has been visited by aliens unless you have PERSONALLY had first-hand experience and had contact with them yourself. Not just even seeing a UFO, that doesn't necessarily prove they are extraterrestrial. To be 100% you must actually see an alien entity live and in person, face to face. Anyone other than that who says they can be "100% certain" are decieving themselves.
Originally posted by stikkinikki
How about life elsewhere in the universe? I am 100% sure that that is a reality because of what we have recently learned about extremeophiles and the tendency of life to continue to show up just when we think we have found a lifeless environment.
The problem left to overcome is getting life from a non Earth environment to survive entry into the Earth environment.
In 4.5 Billion years my money is on extraterrestrial life making it here at least once.