SNI Lecture: Just Follow The Water

All life – as we know it – developed in water and needs water to thrive. Today, we know that Mars once had rivers, lakes, and seas, while the moons of Jupiter and Saturn still harbor more liquid water under their icy crusts than all of Earth’s oceans com- bined. This is why these so-called “Ocean Worlds” became a prime target for the search for evidence of life beyond Earth.