Did you know that if there were stages to life, the chances of us appearing this early would be incredibly low, unless there's something stopping other life forms from showing up? Scientists believe that 'noisy' aliens may be controlling large parts of the universe, making space less inviting for others like us. These loud aliens expand rapidly, changing the appearance of their territories, and might have set a deadline for other advanced life forms to appear. Their quiet counterparts, however, are much harder to spot. By trying to fit this theory into observations, scientists estimate these noisy aliens control about half of the universe's volume and could one day expand over millions of galaxies. If they originated from quiet ones, then there's a very small chance (almost 1 in 10, 000) that our galaxy has ever had another quiet civilization. This could mean tough luck for those searching for extraterrestrial life, but there might be some subtle signs in the sky to discover.
