1. Editorial

   • C. S. Yogananda

   Departments Pages: 1 - 1

2. GNR — A tribute

   • D. Balasubramanian

   Departments Pages: 2 - 4

3. Linus pauling on collagen

   Departments Pages: 5 - 5

4. Professor G N Ramachandran’s contributions to X-ray crystallography

   • K. Venkatesan

   General Article Pages: 8 - 15

5. Early planetary environments and the origin of life

   • P. V. Sukumaran

   Series Article Pages: 16 - 28

6. Bernoulli brothers

   • Utpal Mukhopadhyay

   General Article Pages: 29 - 37

7. The Madras triple helix: Origins and current status

   • Manju Bansal

   General Article Pages: 38 - 47

8. Ramachandran and his Map

   • C. Ramakrishnan

   General Article Pages: 48 - 56

9. Eco-friendly alternative refrigeration systems

   • S. S. Verma

   General Article Pages: 57 - 67

10. One hundred years of peptide chemistry

    • V. V. Suresh Babu

    General Article Pages: 68 - 75

11. Molecules for converting sunlight into electricity

    • Ravi Mosurkal

    General Article Pages: 76 - 86

12. Solution to tangles of mats and maths of rectangles

    • Mandar Joshi
    • Kshitij Khare
    • Sandeep Varma

    Departments Pages: 87 - 91

13. Errata

    • Anil P. Gore
    • S. A. Paranjpe

    Erratum Pages: 91 - 91

14. Errata

    • R. Nityananda

    Erratum Pages: 91 - 91

15. Book reviews

    • N. V. Joshi
    • Baljit Singh
    • S. K. Sikdar

    BookReview Pages: 92 - 100

16. Introduction

    • Rajaram Nityananda

    Departments Pages: 101 - 101

17. Coronae, haloes and glorie

    • C. V. Raman

    Departments Pages: 102 - 103

18. Workshop on Analysis, Probability and Statistics

    Announcement Pages: 104 - 104