I really like swimming <a href="http://www.voterpower.org.uk/procomil-medicine-d239.pdf">procomil forum</a>  "It's like a big beach ball under the ice sheet pushing up on it, and the only way to keep it submerged is if the ice sheet is strong," said Cassini team associate Hemingway, who was lead author on a paper about the findings. "If large roots under the ice shell are the explanation, this means that Titan's ice shell must have a very thick rigid layer."