What does evolution by natural selection mean? How does ​‘survival of the fittest’ explain the transformation of male clownfish into females? Or the many non-combative, non-competitive, and seemingly friendly interactions observed between ants and plants? Does it provide clues to the identity of the mysterious descendants of dinosaurs in today’s world? These are some of the questions we explore in our theme section ​‘Evolution revisited’. In Annals of History, relive unsung surprises in the process of discovery of penicillin with interactive resources designed for the science classroom. How do we use pendulums to illustrate fundamental concepts in mechanics? How do we recognize and clarify incorrect student conceptions of the science of everyday phenomena? Find out with the detachable activity sheets & concept builders in ​‘The Science Lab’.

This issue of the Learning Curve focuses on one of the most important periods in any individual’s life — early childhood. Whatever differences there may be on any other aspect of education, this is one area on which everyone agrees: that the years between birth and eight are the most significant and can make or break a life. So universal is this that it is equally true in all cultures. You will find focus articles by some of the most well-known and much respected educationists in the country, followed by very practical and hands-on approaches to Early Childhood Education (ECE).