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Astronomy

The Potential of the Martian Subsurface for Preserving Biosignatures

Quick fact

While the Martian surface experiences intense radiation that can destroy complex organic molecules within a few hundred million years, just a few metres of rock and regolith can shield biosignatures from the most damaging radiation for billions of years, making the subsurface the most promising archive of past life.

Why this is interesting

You've seen the red, dusty surface of Mars—but did you know that the most exciting clues to life may be hiding metres underground? What makes the deep interior so special?