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Microbes live everywhere that life can exist: the poles, deserts, geysers, rocks, at the bottom of the ocean, and at least as deep as 7 kilometers below the Earth’s surface. Extremophiles can survive in a vacuum and are highly resistant to radiation. Microbes may even be space travelers.
The various mechanisms and adaptations that allowed life to thrive at every extreme on this planet, almost beyond the imagination, indicate that a vast diversity of life throughout the universe is likely the norm, and quite like the microbes on Earth.
