Life off Earth: Are the aliens out there?

What is the likelihood of intelligent life existing elsewhere in the universe? These questions have returned to the centre of attention since the launch of NASA’s Kepler mission. Already, hundreds of so-called exoplanets have been discovered and the first potentially habitable planets are being identified. In this illuminating debate, filmed at the Battle of Ideas a panel of experts consider the possibilities and implications of sentient life being detected elsewhere in the galaxy and how this affects our perception of what it means to be human. Speakers include:  Dr John Elliott, Post Detection Task Force member; writer and teacher Richard Swan; author Mark Vernon and the Chair is Sandy Starr from the Progress Educational Trust.