Why do we measure time in the way that we do? Why is a week seven days long? At what point did minutes and seconds come into being? Why are some calendars lunar and some solar? The organisation of time into hours, days, months and years seems immutable and universal, but is actually far more artificial than most people realise. The French Revolution resulted in a restructuring of the French calendar, and the Soviet Union experimented with five and then six-day weeks. Leofranc Holford-Strevens explores these questions using a range of fascinating examples from Ancient Rome and Julius Caesar's imposition of the Leap Year, to the 1920s' project for a fixed Easter. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Starting with an examination of how historians work, this "Very Short Introduction" aims to explore history in a general, pithy, and accessible manner, rather than to delve into specific periods.

This volume in Oxford's A Very Short Introduction series offers a concise, readable narrative of the vast span of American history, from the earliest human migrations to the early twenty-first century when the United States loomed as a global power and comprised a complex multi-cultural society of more than 300 million people. The narrative is organized around major interpretive themes, with facts and dates introduced as needed to illustrate these themes. The emphasis throughout is on clarity and accessibility to the interested non-specialist.

Time: A Very Short Introduction explores questions about the nature of time that have been at the heart of philosophical thinking since its beginnings: questions like whether time has a beginning or end, whether and in what sense time passes, how time is different from space, whether time has a direction, and whether it is possible to travel in time. These questions passed into the hands of scientists with the work of Isaac Newton when the structure of space and time became connected to motion and included the subject matter of physics. This VSI charts the way that the history of physics, from Isaac Newton through Albert Einstein's two revolutions, wrought changes to the conception of time. There are parts of physics that are in a state of confusion, but this strand of development is a story of philosophical illumination and conceptual beauty. The discussion here provides an opportunity to see what distinguishes the methods of physics from those of philosophy. It brings together physics, cognitive science, and phenomenology in the service of reconciling what modern theories tell us about the nature of time with the everyday living experience of time.

Against the backdrop of unprecedented concern for the future of health care, this i Very Short Introduction/i surveys the history of medicine from classical times to the present. Focussing on the key turning points in the history of Western medicine - such as the advent of hospitals and the rise of experimental medicine - but also offering reflections on alternative traditions such as Chinese medicine, Bill Bynum offers insights into medicine's past, while at the same time engaging with contemporary issues, discoveries, and controversies.

Leofranc Holford-Strevens explores time measurement and the organisation of time into hours, days, months and years using a range of fascinating examples from Ancient Rome and Julius Caesar's Leap Year, to the 1920s' project for a fixed Easter.