Hacker News
- Extraterrestrial Intelligence: Where Is Everybody? [pdf] https://www.haystack.mit.edu/hay/staff/jball/etiy.pdf 2 comments
Linking pages
- 'Zoo hypothesis' may explain why we haven't seen any space aliens https://www.nbcnews.com/mach/science/zoo-hypothesis-may-explain-why-we-haven-t-seen-any-ncna988946 54 comments
- The Zoo Hypothesis: Are Aliens Avoiding Earth? : ScienceAlert http://www.sciencealert.com/the-zoo-hypothesis-are-aliens-avoiding-earth 3 comments
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