Separated from his older brother at a train station, five-year-old Saroo Munshi Khan found himself lost in the slums of Calcutta. Nearly 20 years later, living in Australia, he began a painstaking search for his birth home, using ingenuity, hazy memories, and Google Earth. It was just a small river flowing over a dam, but to five-year-old Saroo Munshi Khan it felt like a waterfall. He played baref