On Fri, Apr 07, 2006 at 10:43:08AM -0700, Jon_Lincicum at stream.com wrote: > > I'm speculating that gravity on Dragaera lighter than Earth, based on the > following: > > 2. At the same time, lighter gravity means that the atmosphere is likely > to be thicker than ours (so that the air-pressure is able to sustain > life), I didn't think that was a given - dunno why Venus has such a dense atmo, but Mars certainly doesn't. On first glance there are a variety of factors besides more gravity = more ability to retain atmo that affect density: http://curriculum.calstatela.edu/courses/builders/lessons/less/les3/press.html Kat