[geoschmo]

It's difficult to hypothesize since the Se4 planetary descriptions aren't very realistic to begin with. Earth isn't really an oxygen atmosphere planet, it's mostly nitrogen. To truly model alien lifeforms we need more complex planetary types. Is a Hydrogen world primarily hydrogen? Or is it mostly some inert gas and 20% hydrogen the way our atmosphere is nitrogen/oxygen? Could a biological process be even theorized that would use hydrogen or methane as it's gas for breathing? I don't really know enough about it to say.

Perhaps creatures on such a world wouldn't really breath the Hydrogen, but survive on the trace gases, or not breath at all. They wouldn't be the same as vacuum lifeforms because they would be acclimated to the pressures on their homeworld. And perhaps the Hydrogen would be neccesary becaue their bodies might react with other gases that would be toxic to their systems.

It's intersting to think about though.
I think you could pretty much make up whatever you want and it would mostly be plausible since we really don't know.

Geoschmo

[ July 15, 2003, 14:41: Message edited by: geoschmo ]