Is it possible for a lifeform to exist without requiring any external means of support, i.e. food, sunlight etc.?
by 
Farino
ANSWERS: 5
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The second law of thermodynamics states that everything will break down (increase entropy) unless you add energy. So life could not continue without the addition of energy, in the form of food or light or heat.
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Frogs do it all the time. I believe there is one that can exist up to 20 yrs in dryed up mud and comeback to life.
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According to a couple of doctors I've talked to, viruses can do this. They can stay dormant for thousands and thousands of years and stay technically "alive". Supposedly, living specimens of HPV have been found in Egyptian mummies.
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There are life forms that can go for extended periods of time without "feeding" ... but eventually everything alive will need to consume something somehow ...
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Yes it's possible, there's just nothing like that on Earth.
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