James Nicoll wrote:

In article .com,
Eric Sadoyama wrote:

Aha. Titan does have an underground ocean. Or at least, it *could* have
one, deep and cold and dark and maybe 15% ammonia. By comparison,
household ammonia cleaners are 5%-10% ammonia.
(http://news.bbc.co.uk/2/hi/science/nature/4196261.stm)



At least one paper I've read said that the subsurface ocean
would be somewhat acidic, although this would be no barrier to life
as we know it. The relative lack of energy inputs is the real limit
on life in that sea.


What do you know about the geothermical energy being released
by gravitational stresses of Titan/Saturn ?

You are a surface being, and as such biased...

How would that energy, lava flows, etc, interact in this
ocean when you have 4 billion years to agitate slowly?

Please remember that Titan has been evolving probably as
long as the rest of the solar system.