A witty and fascinating exploration of the limits of human knowledge of our planet, its history and culture, and the universe beyond. There are many, many things that nobody knows. Do animals have a sense of humour? Why do we have five fingers? What did Jesus do in his youth? Has human evolution stopped? Can robots become self-aware? What goes on inside a black hole? Bringing together The Things That Nobody Knows and Even More Things That Nobody Knows, this bumper volume takes us on a guided tour of 1,001 gaps in our knowledge of cosmology, mathematics, animal behaviour, medical science, music, art and literature.