# Could there be life beneath the surface of Mars or moons?

I realize radiation and extreme temperatures would probably destroy life on the surface of most planets and moons, but could life exist beneath the surface (e.g. like earth worms on earth)?

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That's one of the big questions. ESA scientists, at least, think it's worth looking for underground life. See ExoMars mission.

More likely than earth worms are microbes, since some microbes on Earth live under similar conditions as presumed for underground Mars.

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I asked a question on the same topic few months ago : Could any known, living organisms on Earth survive on Mars?

The answer from dotancohen pointed the Tardigrade that can live in extreme conditions. The other life forms I mentioned may also be resistant to extreme conditions.

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Some of our gas giant's icey moons are thought to have liquid water interiors. Tidal flexing is thought to be a source of heat.

Earth's smoker ecosystem demonstrate life can thrive sans sunlight. This Nasa article talks about Smoker colonies and the possibility of life beneath the surface of icey moons like Europa.

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