Episode 2 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.

This we were talking with Magnus Ivarrson from the Natural History Museum of Stockholm. Magnus told us about his work on the deep biosphere, how he ended up working in palaeontology, and how that led him to Mars...