Here’s what we know about planetary protection during China’s Mars mission



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This spring, China will attempt its first landing on Mars. But in anticipation of this important step, scientists are wondering if the Tianwen-1 rover can carry ground contamination with it to the surface.

Because scientists have high hopes that they will someday find traces of life on Mars, spaceships that land on the planet will be as perfectly free of terrestrial life as possible. These days, that means a complicated cleaning procedure throughout the assembly of the spacecraft and frequent testing for spores, an inactive form of particularly resistant bacteria.

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