Drake equation

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41	PDF Document Add to Reading List Source URL: members.verizon.net Language: English - Date: 2003-09-06 22:06:59 SETI Planetary science Fermi paradox Extraterrestrial life Drake equation Planetary habitability Earth in science fiction Search for extraterrestrial intelligence The Universe Astronomy Space Astrobiology
42	PDF Document Add to Reading List Source URL: openseti.org Language: English - Date: 2008-01-17 15:40:04 Space Spaceflight Holtålen Fermi paradox Hessdalen light Search for extraterrestrial intelligence SETI@home Drake equation Alien visitation SETI Astrobiology Extraterrestrial life
43	PDF Document Add to Reading List Source URL: arxiv.org Language: English - Date: 2005-01-07 07:57:15 SETI Spaceflight Scientific controversies Drake equation Civilization Extraterrestrial Civilizations Earth in science fiction Mythology of Stargate Rare Earth hypothesis Astrobiology Fermi paradox Extraterrestrial life