I should rephrase, scientists have ruled out natural phenomenon and the result of human technology. There are other explanations but they are further on the fri

I should rephrase, scientists have ruled out natural phenomenon and the result of human technology. There are other explanations but they are further on the fringes than alien civilizations. See my other comments with credible sources and the discussion here: https://news.ycombinator.com/item?id=16002771 https://news.ycombinator.com/item?id=16002771