[int_19h]

> common elements are either only liquid at very low temps, (ammonia, methane)

But they are very low temps on our scale, which is centered around water.. There are many places, even in our own solar system, where these are liquid all the time, and water is solid all the time.

[throwaway2048]

Sure but the problem is that chemical reactions are MUCH slower at such low temps, perhaps much too slow for life to exist.