[Tokra]

Maybe someone came by and "stripmined" the planet's biosphere?

They sure did - watch this movie and you can see them do it:

[RobRoy]

I saw that in the theater as a kid. It was one of my favorites. They re-used those cool space ship models from War of the Worlds.

[Vroomfondel]

I didn't think it was water those guys were looking for. I'll have to watch it again...

[Fitzcarraldo]

By the way, Criterion is supposed to be coming out with a DVD of RCOM this year.