planetary protection

Invasion from the blue planet: are we protecting Mars too much?

Are we overprotective of Mars? That is the claim made by Alberto G. Fairén and Dirk Schulze-Makuch in a recent commentary in Nature Geoscience. They argue that current planetary protection policies that try to prevent bodies in the solar system from becoming contaminated by Earth-life are too costly, inhibit scientific exploration and might actually be unnecessary because of natural contamination. How much value does a pristine non-terrestrial environment have?

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