The Curiosity Rover is not officially on Mars to search for signs of life, but one scientist hopes its findings will prove his claim to have found organic material there in nearly 30 years ago.
Gilbert Levin - who led the 'labelled release' experiment on Nasa's 1976 Viking mission to the Red Planet - is hoping that Curiosity will find evidence proving his claim to have found carbon-based molecules there.
If it does, he is ready to demand that his refuted discovery of life on Mars is reinstated.
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