Why explore the moons of Mars?

By Elizabeth Tasker

The Martian Moons eXploration (MMX) mission is set to explore Mars's two moons and return a sample from the inner moon, Phobos. But what makes this mission unique and what can be learnt from the moons that is different from the red planet itself? Dr Ryuki Hyodo (ISAS ITYF Fellow) takes us through the science and importance of our next big sample return mission.