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A New Theory on Why We Haven’t Found Aliens Yet
http://www.slate.com/articles/technology/future_tense/2017/07/maybe_we_haven_t_found_alien_life_because_it_s_sleeping.html
7 comments
19/7/2017
Reddit
Why haven't we found aliens yet?
http://www.bbc.co.uk/news/science-environment-11982757
49 comments
14/12/2010
science
Harvard scientists think they know why we haven't found alien life yet...
https://www.reddit.com/r/aliens/comments/4w5vta/harvard_scientists_think_they_know_why_we_havent/
7 comments
4/8/2016
aliens