The Lost Family: How DNA Testing Is Upending Who We Are

You swab your cheek or spit into a vial, then send it away to a lab somewhere. Weeks later you get a report that might tell you where your ancestors came from or if you carry certain genetic risks. Or the report could reveal a long-buried family secret and upend your entire sense of identity. Soon a lark becomes an obsession, an incessant desire to find answers to questions at the ...