Above: NASA artist rendition of Titan's surface.
Researchers at the space agency believe they have discovered vital clues that appeared to indicate that primitive aliens could be living on the planet.
Data from Nasa's Cassini probe has analysed the complex chemistry on the surface of Titan, which experts say is the only moon around the planet to have a dense atmosphere.
They have discovered that life forms have been breathing in the planet’s atmosphere and also feeding on its surface’s fuel.
Astronomers claim the moon is generally too cold to support even liquid water on its surface.
The research has been detailed in two separate studies.
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NASA Claims Alien Life May Exist on Titan 
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