Proxima B’s circumstances may not be right for life to be on this planet. “There are, however, a number of reasons to doubt that there is life on Proxima b. If the planet is rocky, it could be Earth-like, but it could also be a frozen, Mars-like planet with no atmosphere or a hot, Venus-like planet. It all depends on Proxima b's chemical composition and whether it has either a magnetic field or an atmosphere.” (Approximately Like Earth: Proxima B). The Fermi Paradox explains this as if there were life on other planets, then why haven’t they made contact with us yet? “Our galaxy is some 11 to 13.6 billion (109) years old and contains perhaps 100 to 400 billion stars. If just one advanced civilization had arisen in this period of time and attained the technology necessary to travel between the stars, that advanced civilization could have diffused through or swept across the entire galaxy within 50 million to 100 million years—leaping from star to star, starting up other civilizations, and spreading intelligent life everywhere. But as we look around, we do not see a galaxy teeming with intelligent life, nor do we have any technically credible evidence of visitations or contact with alien civilizations, so we must conclude that perhaps no such civilization has ever arisen in the 13.6-billion-year history of the galaxy. Therefore, the paradox: Although we might expect to see signs of a universe filled with intelligent life (on the basis of statistics and the number of possible "life sites," given the existence of some 100 to 400 billion stars in just this galaxy alone), we have seen no evidence of such. Are we, then, really alone? If we are not alone—where are they?” (Fermi Paradox) In short terms, the Fermi Paradox states that if there were aliens, they would have colonized on other planets, and would have found our planet. Which leads to how even NASA has even launched a spacecraft to look beyond our solar system to find other
Proxima B’s circumstances may not be right for life to be on this planet. “There are, however, a number of reasons to doubt that there is life on Proxima b. If the planet is rocky, it could be Earth-like, but it could also be a frozen, Mars-like planet with no atmosphere or a hot, Venus-like planet. It all depends on Proxima b's chemical composition and whether it has either a magnetic field or an atmosphere.” (Approximately Like Earth: Proxima B). The Fermi Paradox explains this as if there were life on other planets, then why haven’t they made contact with us yet? “Our galaxy is some 11 to 13.6 billion (109) years old and contains perhaps 100 to 400 billion stars. If just one advanced civilization had arisen in this period of time and attained the technology necessary to travel between the stars, that advanced civilization could have diffused through or swept across the entire galaxy within 50 million to 100 million years—leaping from star to star, starting up other civilizations, and spreading intelligent life everywhere. But as we look around, we do not see a galaxy teeming with intelligent life, nor do we have any technically credible evidence of visitations or contact with alien civilizations, so we must conclude that perhaps no such civilization has ever arisen in the 13.6-billion-year history of the galaxy. Therefore, the paradox: Although we might expect to see signs of a universe filled with intelligent life (on the basis of statistics and the number of possible "life sites," given the existence of some 100 to 400 billion stars in just this galaxy alone), we have seen no evidence of such. Are we, then, really alone? If we are not alone—where are they?” (Fermi Paradox) In short terms, the Fermi Paradox states that if there were aliens, they would have colonized on other planets, and would have found our planet. Which leads to how even NASA has even launched a spacecraft to look beyond our solar system to find other