pp 161-163 February 2021 Editorial

Editorial

pp 166-166 February 2021 Science Smiles

Science Smiles

pp 167-176 February 2021 General Article

S S Shrikhande: The Euler Spoiler

Sharad S Sane

pp 177-189 February 2021 General Article

Shrikhande and Designs

Bhaskar Bagchi

pp 191-210 February 2021 General Article

Measuring Causality: The Science of Cause and Effect

Aditi Kathpalia Nithin Nagaraj

pp 211-225 February 2021 General Article

The Many Avatars of Curzon–Ahlborn Efficiency

Ramandeep S Johal Arun M Jayannavar

pp 227-240 February 2021 General Article

CRISPR/Cas for Crop Improvement: A Brief Review

Arvinder Singh Muskan Bokolia

pp 241-244 February 2021 General Article

Discovery of Room Temperature Ionic Liquid: P C Ray versus P Walden

Rajarshi Ghosh

pp 245-256 February 2021 General Article

Continent Deformation Due to Earthquake Cycle and Landscape Evolution

Vineet K Gahalaut

pp 257-274 February 2021 General Article

The Idea of a Lax Pair–Part II: Continuum Wave Equations

Govind S Krishnaswami T R Vishnu

pp 275-280 February 2021 Book Review

What Did You Ask at School Today?

Lilavati Krishnan

pp 281-282 February 2021 Book Review

Let Us Read a Wonderful Story...

Sujata Deshpande

pp 283-289 February 2021 Classics

The Impossibility of Certain Symmetrical Balanced Incomplete Block Designs

pp 291-291 February 2021 Information and Announcements

Masterclass Series

pp 292-292 February 2021 Information and Announcements

Homi Bhabha Centre for Science Education: Admission to PhD Programme in Science Education: 2021

pp 293-293 February 2021 Birds in the Backyard

Bar-headed Goose Anser indicus