John D. RuleySocial Links Navigation Latest articles by John D. Ruley Intelligence: A Rare Cosmic Commodity By John D. Ruley published 10 April 08 A model suggests that intelligent life may be very rare in the universe. The Universe Get the Space.com NewsletterBreaking space news, the latest updates on rocket launches, skywatching events and more!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors MORE FROM SPACE...1SpaceX launches private Fram2 astronauts on historic spaceflight over Earth's poles2Watch a private German rocket explode during 1st orbital launch attempt from European soil (video)3FAA closes investigation into SpaceX Starship Flight 7 explosion4SpaceX launches 28 Starlink satellites to orbit on 1st half of spaceflight doubleheader (video, photos)5NASA launches rockets into auroras, creating breathtaking lights in Alaskan skies (photos)
Intelligence: A Rare Cosmic Commodity By John D. Ruley published 10 April 08 A model suggests that intelligent life may be very rare in the universe.
