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Habitable

Life Elsewhere

Astrobiologists believe that three ingredients which are vital for life. They are water, energy, and organic molecules such as carbon (C). Energy and organic molecules are abundant in the Universe. But liquid water is rare. 

A photograph of a black smoker, an underwater hydrothermal vent located on the ocean floor. The structure releases dark clouds of mineral-rich water, which are visible as it rises from the chimney-like formation, creating a striking contrast against the deep blue background of the ocean
This work by NOAA Ocean Explorer is licensed under Creative Commons Zero v1.0 Universal
Black smoker thermal vent at the bottom of the ocean