I had wondered in my childhood about the straight lines found on the muddy soil: it was raining the previous evening; who would have drawn them overnight! As I grew up, I understood who it is: the lines were drawn by worms, the Earthworms! (term and names: Lumbricus terrestris, Rain worm, Night-crawler, Angleworm, 'Munpulu' in Tamil). Though these brownish worms are found in rainy season, their presence in summer can also be inferred by the mud-disrupted lines on the irrigated farm grounds.
