In our 11th standard chemistry book we encountered a revelation. When the teacher told us that, "Plaster of Paris was the other name for Calcium Sulphate Hemihydrate," some of us looked at each other and telepathically nodded in reverse-agreement: "Calcium Sulphate Hem-whatever is the other name for Plaster of Paris." So the omnipresent 'P-O-P' was something with a 'professional' chemical name! I always thought that in India, Plaster of Paris was affectionately called 'P-O-P' rather than being a simple abbreviation 'P.O.P'. It took me over twelve years of schooling to realize that P-O-P meant serious business. And serious business it is apparently. After staring at the corners of the ceilings of thousands of Indian homes and analyzing the beauty of the cornices made of P-O-P while the fan rotated at the centre of this affordable middle class architectural marvel, I found myself in Paris. To gauge the versatility of this chemical, you...