"That said, data from the Cassini probe orbiting Saturn has shown that the ringed planet's moon has "hundreds of times more liquid hydrocarbons than all the known oil and natural gas reserves on Earth," according to research reported in the Geophysical Research Letters. The stuff is literally falling from the sky...."

http://blog.wired.com/wiredscience/2008/02/titans-organic.html

So, if oil is fossil fuel, this PROVES that dinosaurs existed on Titan.