"Lakes on Saturn's Moon Titan Filled With Liquid Hydrocarbons Like Ethane and Methane, Not Water". ScienceDaily. Retrieved 2010-10-05. ↑ Committee on the Limits of Organic Life in Planetary Systems, Committee on the Origins and Evolution of Life, National Research Council; ; The National Academies Press, 2007; pages 74-75 ↑ Schulze-Makuch, D.; D.H. Grinspoon (2005).