In 2015, on the banks of the river Vaigai, near Madurai in Tamil Nadu, archaeologists unearthed, among several other artefacts, a potsherd with the name ‘Kuviran' scratched on it in Tamil Brahmi script. And that offered many clues to the archaeologists about that civilisation: it told them about the language and literacy levels, the social hierarchy, and the age of a civilisation. What is now known as the ‘Keeladi excavations’ point to the existence of a literate society in parts of South India nearly 2,500 years ago! But how can broken pottery fragments give archaeologists such great insights into our past?