The phrase “fossil fuel” implies oil is a product of hundreds of millions of years of vegetation and animal decay. Oil becomes proof of the theory of evolution. It is further argued that since oil is a fossil fuel, there is a limited amount and once it’s gone, it is gone. However, this theory took a major hit on January 14, 2005. That was the day, the Cassini-Huygens satellite scanned Titan, a moon of Saturn, and found massive quantities methane — literally lakes of methane.