For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this… — Carl Sagan Copy Share Image
A contact with an extraterrestrial civilization is the greatest challenge for mankind in the Third Millennium. We would finally realize that we… — Michael Hesemann Copy Share Image
The evidence that at least one extraterrestrial civilization has visited Earth is extensive both in scope and detail. In its totality it… — Steven M. Greer Copy Share Image
