#6 – Raëlism
With over 90,000 worshippers, Raëlism is one of the biggest religions based on a belief in extraterrestrials. Members of this organization believe that life on our planet was started by the Elohim (a group of aliens). Elohim had supreme knowledge of genetic engineering, through which they synthesized life on Earth. Elohim also contacted about 40 different people, who acted as their prophets. These people include Jesus, Buddha, Moses, Muhammad, etc.