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https://colleges.ccc.edu/event/truman-life-on-other-worlds-the-drake-equation-with-andrew-kerr/ Truman: Life on Other Worlds? The Drake Equation with Andrew Kerr - CCC the drake equation other worlds andrew kerr truman life https://setiathome.berkeley.edu/forum_thread.php?id=84104&postid=1989490 The Drake Equation: Revisiting a Classic Tool to Estimate the Odds of Contact the drake equation classic tool estimate odds