As the festive lecture series celebrates 200 years since they were first introduced by Michael Faraday in 1825, space scientist Maggie Aderin-Pocock explores the evidence for extraterrestrial life. She begins with a look at the Moon, the Earth's nearest neighbour and her favourite space rock, with European Space Agency astronauts Rosemary Coogan, John McFall and Meganne Cristian joining her to illustrate the challenges of human space travel and the reality of colonies on the Moon and beyond