INDIA: The Romani, once known as “gypsies,” are Europe’s largest minority group, with 11 million members. They speak a variety of languages and have a range of customs, but share a common genetic heritage. A study of the DNA of 13 Romani groups from across the continent confirms what was suspected from linguistic analysis—that all the Romani hail from northwestern India, and migrated out approximately 1,500 years ago. —Samir S. Patel