By flipping the question of possible alien life to a question of whether we are unique, researchers find it much more likely the universe has seen many civilisations come and go.
Michelle
Starr, CNET
Tue, 05/03/2016 - 10:31pm
By flipping the question of possible alien life to a question of whether we are unique, researchers find it much more likely the universe has seen many civilisations come and go.