It's a question humanity has pondered for centuries. People have throughout time reported seeing mysterious objects flying in the sky, sightings of little green men, and even being abducted. But is this just the stuff of imagination? Does life exist in outer space? Or are we really all alone?
Some people believe that there is some form of life located on other planets
The belief that life is able to naturally spread throughout the Solar System and Galaxy
Accidental Artificial Panspermia
The belief that humanity has accidentally contaminated other planets with life by sending rovers and landers to their surface that were not sufficiently decontaminated
Independent Development of Simple Life
This is the belief that life is likely to have developed elsehwere in the usiverse completely independntly of other life
Independent Development of Intelligent Life
Similar to the argument of the development of Simple life, but with the added step of the life becoming complex and potentially intellignet
They 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
People holding the belief that life does not exist elsewhere in the universe.
No simple life exists outside of Earth
Aside from Earth, no other life exists in any other regions of the Universe
No other intelligent life will ever exist in the Universe
Not only does life currently not exist elsewhere in the Universe, it has never existed and will likely never exist in the obervable universe
People taking this view consider that in a Universe where there are enormous numbers of worlds like ours it is likely that life has arisen many times. But until we have evidence we don’t know for sure
Drake equation shows a high probability of other civilisation
Several exoplanets have been discovered that may harbour life
The so-called exoplanets are planet found outside our Solar System. Some might be candidate for a life
The question might be irrelevant since there a no means to identify presence of alien life
SETI project have not yielded any results for many years
The Search for Extra-Terrestrial Intelligence has been operating for long without giving any evidence
Technical means does not allow detection of alien life
Our current technology does not allow detection of an alien life.
This page was last edited on Monday, 30 Mar 2020 at 18:39 UTC