Autores:
  • Llegará un tiempo en que los hombres extenderán sus ojos. Verán planetas como nuestra Tierra

    "If the Universe is Teeming with Aliens-- where is Everybody? Fifty Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life". Book by Stephen Webb, p. 150, quoting "Inaugural Lecture as Professor of Astronomy, Gresham College", 2002.