Michael Hanlon is a London-based science journalist and author who writes regularly for national newspapers as well as The Spectator and New Scientist. Michael is the author of five popular science books, including: The Science of the Hitchhiker's Guide to the Galaxy, Ten Questions Science Can't Answer Yet and Eternity: Our Next Billion Years. Michael has participated in a gorilla rescue in Congo, become thoroughly lost in central Borneo and experienced a zero-gravity astronaut training flight over the Nevada desert. He finally saw the light about climate change after a swim in a melt-water lake a mile up on the Greenlandic icecap. Tracey Brown is the Director of Sense About Science, a charity that campaigns for better evidence in public debate and policy making in the UK, and world-wide through international collaboration. She has led award-winning national campaigns to defend sound research and to stop misleading medical claims and, through Sense About Science, is currently challenging the routine concealment of clinical trial data by medical drug development companies. Tracey has contributed to books and journals on science, policy and the public, including Better Science Communication and comments regularly in newspapers, magazines, events and broadcasts.