🚀 go-pugleaf

On Mon, 24 Aug 1998, Adi Livnat wrote:

> Just a side-remark:
> If I'm not mistaken, it has lately become accepted that Sun's radiation is
> not the only primary source of energy that is responsible biological
> phenomena. Heat produced independently by Earth is being used by some
> types of bacteria and maybe other forms of life.  (Which suggests a need
> to re-estimate the probability for extra-terrestrial life).  If anybody's
> interested I can try look for some references.  Hope I'm not misleading
> you on this one... 

Come to think of it, I might have heard about that too, but yeah, a
reference would be interesting.  But I stress that my point is unaffected: 
even in the case of life evolving on a planetesimal heated only by tidal
stresses or radioactivity or whatever, there is an energy flux from the
plantesimal into deep space; the system is not closed.

Chris Hillman

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Thanks!