Chapters in this book

1. Frontmatter i
2. Contents v
3. Preface vii
4. Introduction ix
5. Chapter One Living in Earth’s Geophysical Cycles 1
6. Chapter Two How Our Bodies Keep Time across the Day/Night Cycle 29
7. Chapter Three Sleep – How We Know What We Know 53
8. Chapter Four Sleep – Why We Need It 73
9. Chapter Five Circadian Biology versus 24/7 Living 93
10. Chapter Six Our Home Planet 119
11. Glossary 133
12. References 137
13. Index 145