Dr Lewis Dartnell is a UK Space Agency research fellow at the University of Leicester. He also holds an STFC Science in Society Fellowship, and alongside his astrobiology research writes regular science articles in newspapers and magazines, and has appeared in TV shows such as BBC Horizon, Wonders of the Universe, and documentaries on National Geographic, Discovery and History channels. His third book, ‘The Knowledge: How to Rebuild our World from Scratch’ (www.the-knowledge.org ) is a grand thought experiment on the behind-the-scenes fundamentals of how our world works, and what drove the progression of civilisation over the centuries. The Knowledge is a New York Times and Sunday Times bestseller, and was also awarded The Times 'New Thinking' Book of the Year.