/johnny
“Saturn’s moon, Titan, is loaded with light hydrocarbons, including methane and ethane. It rains methane on Titan.”
It has been recently discovered that thermophilic bacteria, in the sea bottom and in cooling magma, produce methane and hydrocarbon gases,[4][5] but studies indicate they are not produced in commercially significant quantities (i.e. in extracted hydrocarbon gases, the median abiogenic hydrocarbon content is 0.02%, or 1 part in 5,000).
http://en.wikipedia.org/wiki/Abiogenic_petroleum_origin