1. Editorial

   • B. Sury

   Departments 17 February 2022 Pages: 159 - 162

2. Science Smiles

   • Ayan Guha

   Departments 17 February 2022 Pages: 163 - 163

3. Summary of the Work of Narasimhan and Seshadri

   • S. Ramanan

   General Article 17 February 2022 Pages: 167 - 176

4. Learning to See the Elephant

   • Kapil Hari Paranjape

   General Article 17 February 2022 Pages: 177 - 184

5. Neutrinos and the Proposed India-based Neutrino Observatory

   • D. Indumathi

   General Article 17 February 2022 Pages: 185 - 205

6. Creating ‘Nice’ Problems in Elementary Mathematics — II

   • Shailesh A. Shirali

   General Article 17 February 2022 Pages: 207 - 215

7. From Complexity to Simplicity and Back

   • Amit Apte

   General Article 17 February 2022 Pages: 217 - 231

8. The Chemistry of Antioxidants

   • K. Hussain Reddy

   General Article 17 February 2022 Pages: 233 - 245

9. The Human Microbiome: An Acquired Organ?

   • Rajkumar Dhanaraju
   • Desirazu N. Rao

   General Article 17 February 2022 Pages: 247 - 272

10. Optimal Extraction of Heat: An Instructive Problem

    • Jayanth P. Vyasanakere
    • Rajaram Nityananda

    Classroom 17 February 2022 Pages: 273 - 282

11. Predicting the pK_a Values of the Deprotonation Equilibria of Benzenonium Carbocations

    • R. Sanjeeva
    • David Geelan
    • V. Jagannadham

    Classroom 17 February 2022 Pages: 283 - 288

12. The Narasimhan—Seshadri Paper, A Classic

    • B. Sury

    Classics 17 February 2022 Pages: 289 - 295

13. Intersections 7: A (mostly) Scientific Crossword

    • Shobhana Narasimhan
    • Madhavan Mukund

    Departments 17 February 2022 Pages: 297 - 299

14. Intersections 6: A (mostly) Scientific Crossword

    • Shobhana Narasimhan
    • Madhavan Mukund

    Departments 17 February 2022 Pages: 301 - 301

15. Life Under Water

    • Karan Deshpande
    • Sujata Deshpande

    Departments 17 February 2022 Pages: 303 - 303