5 ms·
https://en.wikipedia.org/wiki/Fermi_paradox#Intelligent_alien_species_lack_advanced_technology https://en.wikipedia.org/wiki/Fermi_paradox#Intelligent_alie...
by dashoffset 9y ago
https://en.wikipedia.org/wiki/Fermi_paradox#Intelligent_alien_species_lack_advanced_technology https://en.wikipedia.org/wiki/Fermi_paradox#Intelligent_alie...