New Delhi, March 27 -- An unfamiliar sound assaulted my ears this past week, during the daily sunset walks I take along Miramar beach in Panaji, the capital of India's smallest state. An established epicentre of budget tourism, these sands are usually thronged by delighted holidaymakers at this time of the year, with the waters similarly congested by "party boats"-each one holding hundreds of revellers dancing to pounding Bollywood anthems. But now there's none of that cacophony, only the seemingly deafening crashing of waves. We had forgotten how loud the ocean is, all by itself. The tourists are gone from Goa, disinvited by the global coronavirus emergency. After neighbouring Karnataka and Maharashtra went into lockdown earlier this week,...