Britain may only be a small island, but its great scientists and inventors have literally created the modern world: from the invention of the steam engine, computers and the world-wide web to the discovery of the theory of evolution and the atom. In this five-part series some of Britain's leading scientific figures - Stephen Hawking, Richard Dawkins, James Dyson, David Attenborough, Robert Winston, Paul Nurse, Jim Al-Khalili, Kathy Sykes and Olivia Judson - tell the stories of the people behind these innovations.