Since arriving on Mars in November 2018, NASA InSight (Interior exploration using Seismic Investigations, Geodesy and Heat Transport) mission has detected over 300 marsquakes. They are the first quakes ever detected on Mars, and the first on a planetary body other than Earth or the Moon. The aim of the mission is to use the data to probe the Martian interior and understand the crust, mantle and core structure. This seminar will include an overview of the InSight mission and its key discoveries to date. Further focus of the seminar will be on the impact cratering process on Mars, and how it can be used a tool to probe the crustal structure of Mars, in tandem with the observations by InSight and previous Mars missions.