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Appropriate protection of Mars

Geological and biological processes have eliminated all but the faintest traces of our earliest ancestors on Earth. To understand the origin of life, we must investigate other planets — but we can find what we seek only if we do not contaminate them with Earth life first.

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Figure 1: A Viking lander, enclosed in a bioshield designed to protect against the re-contamination by microbes after heat treatment, is loaded into an oven at the Kennedy Space Center to undergo full-system sterilization.

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Correspondence to John D. Rummel.

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Conley, C., Rummel, J. Appropriate protection of Mars. Nature Geosci 6, 587–588 (2013). https://doi.org/10.1038/ngeo1908

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