It's the big question... is there life on Mars? But should we be looking at how life started on Earth and get to where it is today, in order to answer it?
Professor Ian Hawes is an aquatic biologist. He was one of the first scientists to tackle the minus-50 degree challenge of an Antarctic winter. He's giving his Inaugural Professorial Lecture 'Windows to other worlds: Antarctic lakes, astrobiology and milestone moments for life on ancient Earth'.