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2. The Great Filter It’s a theory about why the universe seems so filled with potential for life and yet we haven’t found it. It states that somewhere between pre-life and an advanced civilization that is capable of colonizing the stars, there’s a Great Filter that stops them and ends life. This means humans fit into one of these three scenarios: We’re rare, meaning we’ve already passed the Great Filter, unlike other civilizations on other planets. We’re the first, meaning conditions in the universe are only now life friendly and we’re among many on our way to the capability of ...

The Cost of Visiting Earth May Be Too Astronomical For Aliens MATT WILLIAMS, UNIVERSE TODAY 27 DECEMBER 2020 In 1950, Italian-American physicist Enrico Fermi sat down to lunch with some of his colleagues at the Los Alamos National Laboratory, where he had worked five years prior as part of the Manhattan Project.   According to various accounts, the conversation turned to aliens and the recent spate of UFOs. Into this, Fermi issued a statement that would go down in the annals of history: "Where is everybody?" This became the basis of the Fermi Paradox, which refers to the disparity bet...