The question of extraterrestrial life has interested people for millennia. In 1950, Dr. Enrico Fermi posed the question succinctly in what has come to be known as the Fermi Paradox. If the universe is as huge and old as we think, why haven't we detected any signs of alien life?
Image credit: Jorge Lopez Ramirez
This guide will help you find more information about how humans from ancient times up to the present have attempted to answer this question from three different perspectives:
Look through the guide for subject-specific information resources or start your own general search of BU's resources.