Tens of thousands of Hindu ascetics and millions of pilgrims took dips in freezing water at the confluence of sacred rivers in northern India this week—the first of a series of major baths in the Maha Kumbh festival, the largest religious congregation on Earth. The festival is unfolding at the confluence of the Ganges, Yamuna, and mythical Saraswati rivers in the city of Prayagraj. Details: