(urth) plantary problems

[Lee Berman]

>Gerry Quinn: "The red star there is called the Fish's Mouth, and on its one surviving 
>world there dwells an ancient and acute mind."
>The planetary system containing Blue and Green has at least two surviving worlds.

 
>Antonio Pedro Marques: Well, one could argue Green is not surviving, as in there may be no 
>intelligent life there at some point.

Yes. The phrase "one surviving world" should inspire the question of why the other
world(s) did not survive rather than be reduced to a simplistic count of one.