Children have a knack of asking great, but challenging, questions: Why is the sea salty? How far away is space? Why can't I tickle myself? What makes me me? But how are we supposed to answer them? Imagine if we could turn to a leading expert and ask them to answer on our behalf. This book gathers over 100 real questions from children and puts them to some of our best-loved and most knowledgeable experts. Alain de Botton explores 'How are dreams made?', Kate Humble explains 'Why do lions roar?' and Heston Blumenthal answers 'Why do we cook food?' Their answers to the Big Questions - some complex, some searching, some surreal and some just plain cute - make this an essential handbook for anyone who wants to understand the complexities of life, the universe and why cakes taste so nice. It includes answers from Sir David Attenborough, Dame Kelly Holmes, Bear Grylls, Derren Brown, Noam Chomsky, Dr Richard Dawkins, Alain de Botton, Annabel Karmel, Jacqueline Wilson, Jarvis Cocker, Marcus du Sautoy, Jessica Ennis, Marcus Chown, Tracey Emin, Harry Hill, Dr Christian Jessen and many more.