Biology Question #3740

Nijin, a 13 year old male from KHD asks on December 12, 2006,

Is there any living thing that doesn't need water to survive in the whole life? If there is anything, I want to know about it.

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The answer

Barry Shell answered on December 12, 2006

All life as we know it requires water. There are some forms of plants, animals and many microorganisms that can live for a long time, maybe decades, in completely dry conditions without water. An article by Peter Alpert in the Journal of Integrative and Comparative Biology discusses these. They can dry up and go completely dormant, but then years later become fully functioning when they get wet again.

Some scientists believe that other forms of life that are not based on water may exist in the universe. Perhaps they exist in an ammonia environment. However, nothing like this has ever been found.

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