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matthyaouw
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Oct13-04, 08:47 AM
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Quote Quote by pebrew
i believe the general stability of our climate/temperatures is also cited as an important factor.
Isn't much of our climate stability due to the presence of life however? Two major carbon sinks in the world are Photosynthesises, and carbonate secreting organisms, and without these, atmospheric carbon would be at an extremely high level, and oxygen at an extreme low.

It's not so much a question of what are the properties of earth that promote life, but what were they 2 or 3 billion years ago?