Book excerpt: Did you know that without the 'lead' in your pencil, there would be no life on Earth? Absolutely everything in the universe is made from just 92 elements - and from aluminium to zinc, many of them are hiding in your very own home! This funny and fascinating guide is bursting with brilliant facts about the atomic ingredients that make up everything around us. Join scientific sleuth Sherlock Ohms as he investigates the elements, and help his enquiries with explosive experiments.