SETI is one of the significant challenges to its framework that expands the purposes of big history. Big history had exerted similar impact on world history, as did previous national histories, which in turn had impacted religious history. Big History seeks to use evidence and the best theoretical analyses to integrate studies of the cosmos, Earth, life on Earth, and humanity. SETI shares the interest in the cosmos, but examines exo-planets, astrobiology, and possible extra-terrestrial intelligence. In this article, we consider the developing relationship between the purposes of SETI and big history.
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