Wikipedia - Fermi Paradox
http://en.wikipedia.org/wiki/Fermi_paradoxEncyclopedia article summarizing the concept.
Submitted in section: Extraterrestrial Life: Fermi's Paradox: Wikipedia - Fermi Paradox
Encyclopedia article summarizing the concept.
Submitted in section: Extraterrestrial Life: Fermi's Paradox: Wikipedia - Fermi Paradox