UFOs: 10 Reasons To Believe And 10 NOT To Believe In Alien Life (PICTURES) 15/10/2012 19:01 Sara C Nelson Senior Editor, The Huffington Post UK UFOs: As The British UFO Research Association Celebrates Half A Century, Here Are 10 Reasons To Believe In Aliens (PICTURES)UFOs: 10 Reasons NOT To Believe In Aliens (PICTURES) SEE ALSO: UFO Files: Ministry Of Defence Official Believed Aliens Could Visit Earth As Tourists, Files ShowEisenhower And The Aliens: Former US President 'Had Three Secret Meetings With Extra Terrestrials''UFO Fragment' Lands In Siberia, Russia (VIDEO, PICTURES)Alien Mother: Whitby Councillor Simon Parkes Describes Extra-Terrestrial Upbringing UFO Encounters UFO Encounters 1 of 46 Roswell America's most infamous UFO case centers in Roswell, N.M. Some people claimed an alien spacecraft crashed there in 1947; the military said it was a weather balloon. Share this slide: Eric Draper, AP More: NASA UFO News Mars Paranormal Defence Suggested For You by Gravity FOLLOW HUFFPOST facebook twitter Suggest a correction GET THE NEWSLETTER Enter your email address to get top stories and blog posts emailed to you each day. CONVERSATIONS FOLLOW HUFFPOST HuffPost UK HuffPost UK HuffingtonPostUK Available on the App Store Android App on Google Play Get it at Blackberry App World HUFFPOST NEWSLETTERS Enter your email address to get top stories and blog posts emailed to you each day. Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements. Learn More.