Since the dawn of time, clocks have shaped our behaviour and values. They are embedded in almost every aspect of modern life, from the time on your smartphone to the atomic clocks that underpin GPS. Anand Jagatia talks to horologist David Rooney about his new book, which tells the history of civilisation in twelve clocks. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>
