Thousands of scientists have undertaken research to understand the way the world works, and in doing so have informed the content of this book. I hope that this book, which briefly summarises the outcomes of their dedication and endeavour, provides inspiration for the next generation to follow in their footsteps.
I would like to thank my family for their ongoing support, and in particular Eve Holden for her constant enthusiasm and my parents Henry Holden and Patricia Holden for their boundless positivity.