John D. Ruley 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. Astronomy 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
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.
