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New research has emphasized the remarkable persistence of life even in the cold vacuum of space.
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A geobiologist has identified structures on Mars that she believes were created by microbial life.
13
The world's deepest ever marine drilling expedition has uncovered signs of life in the 'deep biosphere'.
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The discovery could mean that there is a chance of finding life on other worlds such as Titan.
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The foul-smelling single-celled microbes are believed to have lived more than 3.5 billion years ago.