Encyclopedia of Opinion
Question
Do aliens exist?
Position1 of 4›

Yes, alien life does exist outside of Earth

This position holds that alien life exists beyond Earth. Its arguments range from the claim that aliens have already visited us, to scientific accounts of how life could arise independently elsewhere or be seeded across worlds through natural or accidental panspermia.

Supporting arguments · 5

  1. Accidental artificial panspermia explains alien life
    The belief that humanity has accidentally contaminated other planets with life by sending rovers and landers to their surface that were not sufficiently decontaminated
  2. Natural panspermia explains alien life
    The belief that life is able to naturally spread throughout the Solar System and Galaxy
  3. Independent development of simple life explains alien life
    This is the belief that life is likely to have developed elsehwere in the usiverse completely independntly of other life
  4. Independent development of intelligent life explains alien life
    Similar to the argument of the development of Simple life, but with the added step of the life becoming complex and potentially intellignet
  5. There is evidence to suggest that aliens have visited us already
    Millions of people believe that aliens exist and have visited the Earth in flying saucers. Some believe that many of the ancient civilisations were taught or assisted by aliens