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![Arewehumansaloneinspace？Scientistshavebeenworkingonthis...]( "Arewehumansaloneinspace？Scientistshavebeenworkingonthis...")
Arewehumansaloneinspace？Scientistshavebeenworkingonthis...
问题详情：Arewehumansaloneinspace？Scientistshavebeenworkingonthisquestionforalongtime．Andrecently，newdiscoveriesoffermorehopethatsomeformoflifeexistedonMarsinthepast，andperhapsisstillthereatpresent．According...
