Titan’s atmosphere is thicker than Earth’s, its rivers and lakes are made of methane and ethane, and NASA is sending a nuclear-powered drone there because on Saturn’s largest moon, flying may be easier than driving. - Space Daily

Titan, the largest moon of Saturn, has a denser atmosphere than Earth and a surface where rain, rivers, and seas are made of liquid hydrocarbons rather than water. And NASA is building a rotorcraft to explore it, because Titan’s physical conditions genuinely …