Math for Students
: Extraterrestrial Life
Life on Mars@
Science: Top/Science/Astronomy/Extrasolar Planets
Life Extraterrestrial: Life on Other Planets in the Solar System
: Curriculum framework for comparing Earth to other planets with regard to life.
Search for ET!
: Interactive Flash tutorial exploring the possibility of and search for life on other worlds.
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.
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