pp 863-865 July 2021 Editorial

Editorial

Jasjeet Singh Bagla

pp 868-868 July 2021 Science Smiles

Science Smiles

pp 869-893 July 2021 General Article

Govind Swarup: Tribute to a Legend

Dhruba J Saikia

pp 895-917 July 2021 General Article

Beginnings and Growth of Radio Astronomy in TIFR: The Ooty Radio Telescope and the Giant Metrewave Radio Telescope

S Ananthakrishnan V Balasubramanian

pp 919-938 July 2021 General Article

Atomic Hydrogen in Distant Galaxies

Nissim Kanekar Aditya Chowdhury Jayaram N Chengalur

pp 939-951 July 2021 General Article

Quantum Game Theory - III: A Comprehensive Study

Indranil Ghosh

pp 953-970 July 2021 General Article

Machine Learning in Nonlinear Dynamical Systems

Sayan Roy Debanjan Rana

pp 971-998 July 2021 General Article

Genome Editing: Revolution in Life Sciences

Alok Kumar Singh Sivaprakash Ramalingam Desirazu N Rao Srinivasan Chandrasegaran

pp 999-1006 July 2021 Classroom

Four Color Problem

Jasbir Chahal Rebekah Bassett Jennifer Canizales Thomas Fackrell Vanessa Rico

pp 1007-1013 July 2021 Classroom

Visual Estimation of Sum of First $n$ Triangular, Tetrahedral and Pentatope Numbers

Rajib Mukherjee Manishita Chakraborty

pp 1015-1021 July 2021 Classroom

Upper Limit of the Periodic Table and the Future Superheavy Elements

Rajarshi Ghosh

pp 1023-1026 July 2021 Classics

Evidence of Limb-brightening of the Sun at 60 cm Wavelength

Swarup G Parthasarathy R

pp 1027-1027 July 2021 Information and Announcements

Evidence of Limb-brightening of the Sun at 60 cm Wavelength

pp 1028-1028 July 2021 Errata

Errata

pp 1029-1029 July 2021 Birds in the Backyard

Barbets