The Search for Extraterrestrial Intelligence
In its search for extraterrestrial life, astrobiology is limited by the enormous distances that separate the stars of our galaxy. As one may assume that interstellar probes will remain outside our possibilities for a long time, the only forms of extraterrestrial life we can discover outside our Solar System are those capable of being detected from a very large distance.
KeywordsRadio Wave Celestial Body Convergent Evolution Giant Planet Stone Tool
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