Aliens May Have Concluded No Intelligent Life on Earth Aug 28, 2014 20:11:12 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by thedirtman on Aug 28, 2014 20:11:12 GMT -5 A lot of people ask StarTalk Radio host Neil deGrasse Tyson if extraterrestrial life exists and why haven't we encountered any alien life yet.