The Search for a New Earth

Professor Stephen Hawking thinks the human species will have to populate a new planet within 100 years if it is to survive. With climate change, overdue asteroid strikes, epidemics and population growth, our own planet is increasingly precarious. In this landmark series, The Search for a New Earth (original title - Expedition New Earth) he enlists engineering expert Prof Danielle George and his own former student, Christophe Galfard, to find out if and how humans can reach for the stars and move to different planets