Resolved little green men visited long ago

"Our first conclusion shows that if diffusive stellar motions are accounted for it appears almost unavoidable that if any interstellar-space-faring civilization arises, the galaxy will become fully settled in a time less than, or at very least comparable to its present age."

Anyone remember chariots of the gods by kurt voneget, yeah like that

"Von Däniken's book, and much of his subsequent publications as Gods From Outer Space and The Gold Of The Gods, have drawn largely negative receptions from the academic mainstream despite being popular best-sellers. Many scientists and historians have rejected his ideas, claiming that the book's conclusions were based on faulty, pseudoscientific evidence, some of which was later demonstrated to be fraudulent or fabricated, and under illogical premises.

"A 2004 article in Skeptic magazine states that von Däniken plagiarized many of the book's concepts from The Morning of the Magicians, that this book in turn was heavily influenced by the Cthulhu Mythos, and that the core of the ancient astronaut theory originates in H. P. Lovecraft's stories "The Call of Cthulhu" and At the Mountains of Madness." [7]

"i know there is no solid proof."

"Our first conclusion shows that if diffusive stellar motions are accounted for it appears almost unavoidable that if any interstellar-space-faring civilization arises, the galaxy will become fully settled in a time less than, or at very least comparable to its present age. In particular, we confirm that the conclusions of Newman & Sagan (1981) that settlement fronts can “stall” for timescales longer than the age of the Milky Way are not valid for real systems of stars with thermal velocities, as suggested by Brin (1983); Ashworth (2012); Wright et al. (2014). Thus if the practical and technological impediments to interstellar settlement are overcome, then the “wave” of settlement should sweep across the entire Galaxy." [1]

"there is no way for you to disprove the little green men"

"Argument from ignorance (from Latin: argumentum ad ignorantiam), also known as appeal to ignorance (in which ignorance represents "a lack of contrary evidence"), is a fallacy in informal logic.    It asserts that a proposition is true because it has not yet been proven false or a proposition is false because it has not yet been proven true.

This represents a type of false dichotomy in that it excludes the possibility that there may have been an insufficient investigation to prove that the proposition is either true or false.  It also does not allow for the possibility that the answer is unknowable, only knowable in the future, or neither completely true nor completely false.  In debates, appeals to ignorance are sometimes used in an attempt to shift the burden of proof. In research, low-power experiments are subject to false negatives (there would have been an observable effect if there had been a larger sample size or better experimental design) and false positives (there was an observable effect; however, this was a coincidence due purely to random chance, or the events correlate, but there is no cause-effect relationship)." [1]