Overview: From the 8th to 11th century, the Vikings ruled what is now Scandinavia and terrorized Northern Europe. But a thousand years ago, these fearsome fighters disappeared from history. Now, a remarkable discovery in Denmark may finally explain what defeated this seemingly invincible nation. Follow a team of archaeologists as they excavate a fascinating burial site, use state-of-the-art X-ray technology to analyze their findings, and examine the life of an elite warrior.