There's so much left unproven, maybe someday there will be a scientific basis for the existence of ghosts and bigfoot that would explain everything, but some just don't want to leave their comfort zone of what they believe to be true, no one wants to question anything and turn their reality on its head.Aliens are definitely real! What are the chances that in an infinite universe there's not at least one other place like ours in existence? Very unlikely, it's impossible! But have they really visited us is the real question.