Mind Matters Natural and Artificial Intelligence News and Analysis


Alien arrival on planet Earth, full moon rises above the horizon

Particle Physicist Offers 75 Reasons We Don’t See Aliens

But Oxford’s Future of Humanity Institute gives high odds that we are the only intelligent beings in the galaxy

Recently, we’ve been looking at Matt Williams’s admirable collection of hypotheses as to why we do not see intelligent extraterrestrials, despite the size of our universe. But particle physicist Stephen Webb collected many more such theses, in a book published in 2002, If the Universe Is Teeming with Aliens … WHERE IS EVERYBODY?: Fifty Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life (2002). A revised edition was published by Springer, a big science publisher, in 2015, offering 75 hypotheses. Webb calls his collection of hypotheses the “Fermi solutions,” in honor of Italian physicist Enrico Fermi (1901–1954), whose famous question was “Where are They?” “Fermi realized that any civilization with a modest amount of rocket technology and an…