pp 453-455 April 2020 Editorial

Editorial

pp 458-458 April 2020 Science Smiles

Science Smiles

pp 459-475 April 2020 Article-in-a-Box

George Robert Price (16 October 1922–5 January 1975)

Amitabh Joshi

pp 477-484 April 2020 General Article

A New Bug on the Block

Shahid Jameel

pp 485-490 April 2020 General Article

Lockdown Maths Part 1: Why We Must Comply

Partha P Majumder

pp 491-493 April 2020 General Article

Lockdown Maths Part 2 Relaxation of Lockdown—Perilous

Partha P Majumder

pp 495-512 April 2020 General Article

The Price Equation and the Mathematics of Selection

Amitabh Joshi

pp 513-538 April 2020 General Article

The Central Force Problem in n Dimensions

V Balakrishnan Suresh Govindarajan S Lakshmibala

pp 539-565 April 2020 General Article

Fundamental Concepts of Synchronization: An Introduction: From Classical to Modern

Nitu Kumari Shubhangi Dwivedi

pp 567-577 April 2020 General Article

Permissible Synthetic Food Dyes in India

Jyoti Mittal

pp 579-584 April 2020 Classroom

A Single Measurement Method to Find Refractive Index

Amal Nathan Joseph

pp 585-594 April 2020 Reflections

The Marvel and the Mystery of Quantum Mechanics – Some Reflections

N Mukunda

pp 595-608 April 2020 Face to Face

Deciphering the Gene Machine Face-to-Face With Professor Venki Ramakrishnan

pp 609-609 April 2020 Birds in the Backyard

Pied Kingfisher (Ceryle rudis)