1. Editorial

   • T. N. C. Vidya

   Departments 05 December 2019 Pages: 1051 - 1053

2. Science Smiles

   • Ayan Guha

   Departments 05 December 2019 Pages: 1056 - 1056

3. Sydney Brenner (1927–2019)

   • Varsha Singh

   Departments/Article-in-a-Box 05 December 2019 Pages: 1057 - 1059

4. Sydney Brenner: The Tamer of an Elegant Worm

   • Kaling Danggen
   • Varsha Singh

   General Article 05 December 2019 Pages: 1061 - 1069

5. Retrosynthetic Analysis

   • Bharati V. Badami

   General Article 05 December 2019 Pages: 1071 - 1086

6. How to Design Experiments in Animal Behaviour

   • Raghavendra Gadagkar

   Series Article 05 December 2019 Pages: 1087 - 1107

7. Introduction to the Series on Megaprojects

   • K. Indulekha

   Series Article 05 December 2019 Pages: 1109 - 1122

8. The Sounds of Music: Science of Musical Scales

   • Sushan Konar

   Series Article 05 December 2019 Pages: 1125 - 1135

9. Young-tableaux: A Tetris-Brick Game for Getting Atomic Term Symbols

   • Pradeep Kumar

   Classroom 05 December 2019 Pages: 1137 - 1149

10. Two Identities

    • Chanchal Kumar

    Classroom 05 December 2019 Pages: 1151 - 1165

11. Remembering the Mahatma

    • K. Indulekha

    Departments/Reflections 05 December 2019 Pages: 1167 - 1170

12. General Nature of the Genetic Code for Proteins

    • Varsha Singh
    • F. H. C. Crick
    • R. J. Watts-Tobin

    Classics 05 December 2019 Pages: 1171 - 1178

13. Resonance Congratulates the Awardees of Shanti Swarup Bhatnagar Prize (SSB) for Science and Technology 2019

    Information and Announcements 05 December 2019 Pages: 1179 - 1179

14. IUCAA Online Refresher Course in Astronomy and Astrophysics

    Information and Announcements 05 December 2019 Pages: 1181 - 1181

15. Flowering Tree

    Departments/Inside Back Cover 05 December 2019 Pages: 1182 - 1182