Over the centuries, the Taj Mahal has endured its share of attacks — plundered by the Jats of northern India and looted by British soldiers, among other indignities. In recent years, officials have worried that growing air pollution could permanently darken the tomb’s brilliant white exterior.  But few people anticipated the latest affront — millions of mosquito-like insects, their numbers supercharged by nutritious algae blooming profusely along the banks of […]