Drake's equation attempts to estimate the number N of currently extant civilizations in our galaxy that would be able to contact each other.
Summary and a few probability calculations.
Suggests that aliens might be "preparing" mankind for the eventuality of meeting species from other worlds.
Long article discussing the implications of what is known so far about other life in the universe.
Discusses the Allen Telescope Array (ATA) scheduled to be completed by 2005 and the search for extraterrestrial life as it related to Fermi's Paradox and the Drake Equation.
Describes the famous formula for estimating the number and character of alien civilizations within the galaxy. Includes an online form that calculates your numbers.
Introductory articles on the theory.
Discusses some of the logic behind arguments for and against humans being alone in the universe.
Links to articles and documents explaining or discussing the paradox.
Encyclopedia article summarizing the concept.
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