Joined by a live audience at the Cheltenham Science Festival in the UK, Tom Whipple asks what are the true limitations of alien life? Planetary scientist at MIT Sara Seagar discusses her team’s mission to Venus where, on the surface, temperatures can reach 500 degrees Celsius and it rains sulphuric acid. Above the rain, up in the clouds, Sara Seagar tells us how there could be life. These are organisms on earth that are found in places we once thought impossibly hostile to life. Plus, the missions to find life on Mars.... Presenter: Tom Whipple Producer: Dan Welsh Editor: Ilan Goodman & Martin Smith Production Coordinator: Jana Bennett-HolesworthProgramme Website