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...1NASA tests cellphone-sized underwater robots for future ocean world missions (video)2How a mini-team of NASA archivists is restoring astronomical history3SpaceX launches 20 Starlink satellites from California (photos)4'Silo' Season 2: 'Order': How long until Silo 18 erupts into a bloody riot?5This Week In Space podcast: Episode 138 — From the Garage to Mars
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.
