Andrew Schuerger, from the University of Florida seems to think so. “Life as we know it is likely to exist on Mars – because we put it there, he claims”.

There is a good chance that bugs hitched a ride to Mars on probes from Earth and could still be living on the planet, said Andrew Schuerger, from the University of Florida.



Only the two Viking craft that landed on the Red Planet in 1976 were adequately sterilised, he told a meeting of planetary scientists in Houston, Texas.



The procedures used for all missions since then, including Nasa’s twin rovers and…



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