Some have a hard time grasping that this the only planet with intelligent life.
Earth is merely the only planet we know of with intelligent life. In a universe as vast as ours, the probabilities of only one planet having intelligent life, are zero.
49 posted on 04/07/2015 8:37:54 PM PDT by Windflier
(To anger a conservative, tell him a lie. To anger a liberal, tell him the truth.)