1. Editorial

   • Krishnapriya Tamma

   Departments 15 August 2021 Pages: 1029 - 1031

2. Science Smiles

   • Ayan Guha

   Departments 15 August 2021 Pages: 1034 - 1034

3. The Life of Alexander von Humboldt

   • Krishnapriya Tamma
   • Ashwini Venkatanarayana Mohan

   Departments 15 August 2021 Pages: 1035 - 1040

4. The Lasting Contribution of Alexander von Humboldt to Our Understanding of the Natural World

   • Ashwini Venkatanarayana Mohan
   • Krishnapriya Tamma

   General Articles 15 August 2021 Pages: 1041 - 1050

5. Aurora and Its Underlying Science

   • Prittam Goswami

   General Articles 15 August 2021 Pages: 1051 - 1057

6. Complex Numbers and Rhythmic Changes

   • V. G. Geethamma
   • Deepa P. Gopinath
   • Jacob K. Daniel

   General Articles 15 August 2021 Pages: 1059 - 1080

7. The Bicycle

   • Amitabha Ghosh

   General Articles 15 August 2021 Pages: 1081 - 1102

8. Stochastic Thermodynamics

   • Sushanta Dattagupta

   General Articles 15 August 2021 Pages: 1103 - 1123

9. A Portrait of the Chemist as an Artist

   • Amrit Krishna Mitra

   General Articles 15 August 2021 Pages: 1125 - 1140

10. Special Properties of a Triangle with an Angle of 60°

    • Moshe Stupel
    • Victor Oxman
    • Avi Sigler

    Classroom 15 August 2021 Pages: 1141 - 1152

11. A Jarring Bullet: An Indian National Physics Olympiad 2020 Problem

    • Vivek Lohani
    • Nishant Abhangi
    • Amitabh Virmani

    Classroom 15 August 2021 Pages: 1153 - 1168

12. Two Simple Partial Fractions

    • Hariom Gupta

    Think It Over 15 August 2021 Pages: 1169 - 1169

13. Intersecting Parallels: Humboldt the Great Explorer and Gauss the Prince of Mathematics

    • Shobhana Narasimhan

    Book Review 15 August 2021 Pages: 1171 - 1174

14. Intersections 1: A (mostly) Scientific Crossword

    • Shobhana Narasimhan

    Departments 15 August 2021 Pages: 1175 - 1177

15. Life Under Water

    • Nikhil Thomas
    • Sujata Deshpande

    Departments 15 August 2021 Pages: 1178 - 1178