1. Editorial

   • N. Mukunda

   Departments Pages: 1 - 1

2. Dorothy Crowfoot Hodgkin — A tribute

   • M. Vijayan

   Departments Pages: 2 - 4

3. Science smiles

   • R. K. Laxman

   Departments Pages: 5 - 5

4. Chaos

   • K. Krishan
   • Manu
   • R. Ramaswamy

   Series Article Pages: 8 - 15

5. Astronomical spectroscopy

   • J. C. Bhattacharyya

   General Article Pages: 16 - 24

6. The class number problem

   • Rajat Tandon

   General Article Pages: 25 - 30

7. Enzyme kinetics? Elementary, my dear …

   • Desirazu N. Rao

   General Article Pages: 31 - 39

8. There’s no such thing as a free lunch

   • Vivek S. Borkar

   General Article Pages: 40 - 51

9. Iron sulfur proteins and their synthetic analogues: Structure, reactivity and redox properties

   • B. N. Anand

   General Article Pages: 52 - 61

10. Nature watch

    • G. Marimuthu

    Feature Article Pages: 62 - 69

11. What are negative absolute temperatures?

    • V. Subrahmanyam

    Departments Pages: 70 - 73

12. Chemists don’t digest

    • B. N. Anand

    Departments Pages: 74 - 75

13. Locate the electrons

    • Anirban Sadhu

    Departments Pages: 75 - 75

14. Furthest ever galaxy discovered

    • Biman Nath

    Research News Pages: 76 - 77

15. Book review

    • A. K. Vijaykumar
    • K. B. Sinha

    BookReview Pages: 78 - 81

16. Wandering scientists

    • Dorothy Hodgkin

    Reflections Pages: 82 - 91

17. Indian association for the cultivation of science

    • Kankan Bhattacharyya

    Information and Announcements Pages: 92 - 94

18. The 39th International Mathematical Olympiad

    • Shailesh Shirali

    Information and Announcements Pages: 95 - 95

19. Errata

    • S. Ranganathan

    Erratum Pages: 97 - 97

20. Acknowledgements

    Acknowledgments Pages: 97 - 97