1. Editorial

   • N. Sathyamurthy

   EditorialNotes 14 December 2018 Pages: 1055 - 1056

2. Science Smiles

   • Ayan Guha

   Announcement 14 December 2018 Pages: 1057 - 1057

3. Lars Onsager (1903–1976)

   • Biman Bagchi

   General Article 14 December 2018 Pages: 1061 - 1071

4. Onsager’s Reciprocal Relations

   • Biman Bagchi

   General Article 14 December 2018 Pages: 1073 - 1075

5. The Development of Quantum Mechanics

   • Arvind
   • Kavita Dorai
   • N. Mukunda

   General Article 14 December 2018 Pages: 1077 - 1100

6. How to Design Experiments in Animal Behaviour

   • Raghavendra Gadagkar

   Series Article 14 December 2018 Pages: 1101 - 1116

7. (Re)setting Ties Between Scientists and Society

   • Ramray Bhat

   Reflections 14 December 2018 Pages: 1117 - 1122

8. Classics

   • N. Sathyamurthy

   OriginalPaper 14 December 2018 Pages: 1123 - 1145

9. Crossword

   • Leena Thorat

   OriginalPaper 14 December 2018 Pages: 1147 - 1150

10. Erratum to: How to Design Experiments in Animal Behaviour

    • Raghavendra Gadagkar

    Erratum 14 December 2018 Pages: 1151 - 1151

11. Science Academies’ Refresher Course in Experimental Physics

    Information and Announcements 14 December 2018 Pages: 1153 - 1153

12. Science Academies’ Refresher Course on Upskilling Chemistry Teachers on Latest Pedagogical Tools for Impactful Teaching

    Information and Announcements 14 December 2018 Pages: 1154 - 1154

13. Science Academies’ Refresher Course on Classroom Chemistry – Concepts and the Curiosities

    Information and Announcements 14 December 2018 Pages: 1155 - 1155

14. Science Academies’ Refresher Course on Experimental Physics

    Information and Announcements 14 December 2018 Pages: 1156 - 1156

15. Science Academies’ Refresher Course in Plant Taxonomy

    Information and Announcements 14 December 2018 Pages: 1157 - 1157