Episode 9 of the Tartan Tardigrade, a podcast where scientists from the UK Centre for Astrobiology talk to guests from around the world about their research in astrobiology, their careers, and the prospects for life in the universe. In this episode we talk to Roberto Orosei from the Italian National Institute for Astrophysics, who told us about his recent discovery of a subsurface lake on Mars and his research of radar applications on other planets.