The discovery of alien life would change human history….but are astronomers on the case? Chris Lintott will take us through fifty years of weird and wonderful discoveries that turned out not to be alien life.

Chris Lintott is a professor of astrophysics at the University of Oxford, where he is also a research fellow at New College. As Principal Investigator of the Zooniverse, he leads a team who run the world’s most successful citizen science projects, allowing more than a million people to discover plangets, transcribe ancient papyri or explore the Serengeti. A passionate advocate of the public understanding of science, he is best known as co-presenter of the BBC’s long running Sky at Night program. His new book, “The Crowd and The Cosmos”, is out later this year.