Good questions. Anyone who has'nt seen today's APOD,
it's worth a look:  http://apod.nasa.gov/apod/astropix.html

Jack

On 4/10/08, David VanHorn <microbrix@gmail.com> wrote:
> So mars used to have water and maybe a biosphere, and it all went away.
>
> Mars has two moons, whose orbit is decaying significantly.
>
>
> What if it used to have a third moon, which decayed long ago.
>
> Dya suppose that might have had a terminal impact on things?
>
> Just wondering.
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