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we're concerned especially about

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planetary protection is about the

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concern for biological contamination of

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celestial bodies planets like the earth

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and mars

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and in other bodies like the moon and

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asteroids microbes are single-celled

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organisms like bacteria and fungi

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on earth microbes have adapted to live

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in almost every environment we've looked

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at

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microbe is not a bad thing so without

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microbes we cannot live

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in the grand scheme of things

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90 plus percent are really good microbes

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[Music]

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the microbial environment is an

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important part of human health

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we need certain microbes to survive and

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of course we know some microbes cause

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disease

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so we want to understand exactly what's

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happening on the space station so we can

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plan for

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our longer journeys to the moon and to

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mars

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[Music]

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when you are exploring other planets we

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need to leave the other planet as

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pristine as possible without

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contaminating

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microbes mars which is red become green

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we're concerned about forward

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contamination which is where we take

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life on earth and contaminate other

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bodies and we're concerned about if