Should Humanity Try to Contact Alien Civilizations? - Space.com
http://www.space.com/28632-active-seti-search-alien-life.htmlSubmitted in section: Paranormal news 2015: Should Humanity Try to Contact Alien Civilizations? - Space.com
Submitted in section: Paranormal news 2015: Should Humanity Try to Contact Alien Civilizations? - Space.com