Release Message:  If there are, as probability would suggest, many other sentient species in the Universe, then where are they? Shouldn't their presence be obvious? Authored by Enrico Fermi.

Description:  The Fermi paradox (or Fermi's paradox) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilization and humanity's lack of contact with, or evidence for, such civilizations.[1] The basic points of the argument, made by physicists Enrico Fermi and Michael H. Hart, are: The Sun is a young star. There are billions of stars in the galaxy that are billions of years older; Some of these stars likely have Earth-like planets[2] which, if the Earth is typical, may develop intelligent life; Presumably some of these civilizations will develop interstellar travel, a technology Earth is investigating even now; At any practical pace of interstellar travel, the galaxy can be completely colonized in a few tens of millions of years.