this fairly simple scenario and some puzzling qualities of Titan. However, it's also an incredibly simplistic view of the geological history of a very complicated world, something that Jeff is very ready to admit. But Ralph Lorenz, who commented on the talk, agreed that it was an intriguing and probably correct point that climate change on Titan can change its tectonics (the processes that form mountains and basins). In general, I love the convivial nature of the arguments that happen among this particular community.
So the Titan stuff has been very fun. There's already been so much more, though, from other icy worlds, and Mars of course. Sadly, nothing much from Venus; I poked my head into that session this morning to see the same people making only slightly different arguments than they had been making ten years ago. We need a new Venus mission. Venus, in fact, is another place where climate change may have had a direct effect on the nature of its geologic activity (and vice versa, of course). Maybe it's time for an interdisciplinary session on atmospheric forcing of planetary tectonics!