In 2003, the first human genome was sequenced. But the secrets it held were never revealed. The truth was discovered thirty years ago, almost by accident. Dr. Paul Kraus had spent his entire career searching for what he called humanity's lost tribes--human ancestors who had gone extinct. When Kraus compared the DNA samples of the lost tribes with our own, he found a pattern of changes: a code. At the time, the technology didn't exist to unravel what...