See also:

• Science: Astronomy: Extrasolar Planets  (38)
• Society: Paranormal: UFOs  (285)

This category in other languages:
	Danish  (6)   Dutch  (14)   French  (22)   German  (31)   Italian  (11)   Russian  (4)   Spanish  (8)

The Planetary Society - - A nonprofit organization devoted to the exploration of the solar system and the search for extraterrestrial life.

The Rise and Fall of Star Faring Civilizations in Our Own Galaxy - - Speculation, based on the Drake Equation, regarding the existence and composition of alien civilizations.

Search for ET! - - Interactive Flash tutorial exploring the possibility of and search for life on other worlds.