"Marc Jacquier" <jac### [at] wanadoofr> wrote in message
news:401cc9d3$1@news.povray.org...
>

> 401c9259$1@news.povray.org...
> > Of course, one thing a planet with water needs is plantlife
>
> It should have no chance to do so in the time liquid water was at the
> surface of mars.

Always debateable but, yes, I think you have a good point there. I used the
word plantlife in a very broad sense, including things like algae and even
protist slimey stuff someplace. :-)

This brings up something about the coloration of the water used here in
Wolfgang's rendering. My first thought was of water-borne life because of
the greenish tinge. A large manmade lake nearby here has a sometimes vivid
green coloring in certain places, brownish in others, yet overall tends to
be green hues. I don't know of any water having green colorations without
plantlife within it so its natural to think of it as life-bearing.

That might be something to change then to reflect a more sterile water on an
early Mars.

Bob H.

Post a reply to this message