Book excerpt: Almost everything we do each day relies on electricity, but what is it and where does it come from? Electricity explores how electric currents appear in nature, from static to lightning bolts, and how these natural marvels inspired scientists to conduct experiments and find ways to harness power. It looks at how we create electricity and the many ways it is used every day. You can build your own encyclopedia with Ladybird Books. Other titles available in the series: Animal Habitats Insects and Minibeasts Baby Animals Trees Sea Creatures The Human Body Weather Trains The Solar System