- Both have lakes, rivers, and seas as a result.
- Both have rain which affects the geology of the planet, although Titan's lakes are made up of liquid methane and ethane.
Mr. Rahm added: "This is a starting point, as we are looking for prebiotic chemistry in conditions other than Earth's." "We need to continue to examine this, to understand how the chemistry evolves over time. We see this as a preparation for further exploration."