Greatest Mysteries

From the Indus Valley to the Minoans, entire advanced societies have vanished from history with barely a whisper. What could cause thousands—or millions—of people to abandon thriving cities, leaving archaeologists centuries later to piece together fragments of their final days? We're counting down six lost civilizations whose disappearances remain utterly baffling.

Carbon-dated to the 15th century, the Voynich Manuscript contains 240 pages of bizarre botanical drawings, astronomical charts, and human figures—all accompanied by text in a language that may not even exist. We examine the book's mysterious provenance, the countless failed attempts to decode it, and the unsettling possibility that it might be either an elaborate hoax or contain knowledge we're simply not equipped to understand.

In the span of just eleven years, two strangers appeared in Europe speaking unknown languages and claiming extraordinary origins. One was a confused teenage boy who had supposedly been imprisoned his entire life; the other, an exotic princess from a distant island. Were they victims, con artists, or something far stranger?

Billions in gold, jewels, and artifacts vanished throughout history—and unlike legends, these treasures are documented as real. We're counting down seven spectacular lost fortunes that modern treasure hunters are still actively seeking, from the depths of the ocean to hidden mountain caves. One of them might be in your own backyard.

In July 1954, a well-dressed European businessman landed at Tokyo's Haneda Airport carrying a passport from Taured—a country that has never existed. He spoke multiple languages, carried currencies from several nations, and insisted he'd visited Japan multiple times before, yet the country marked on his map had a different name. What happened during his overnight detention would deepen the mystery even further.

Two massive events fell from the sky, flattening forests and igniting decades of speculation. One sparked theories of comets and asteroids; the other launched the modern UFO phenomenon. We examine what these twin mysteries reveal about how evidence, timing, and culture shape the stories we tell about the unexplained.

From the haunting Zodiac Killer's 340-character cipher to the mysterious Voynich Manuscript, some codes have resisted centuries of attempts to crack them. Join us as we count down five encrypted messages that continue to perplex cryptographers, historians, and amateur sleuths around the world. Could you be the one to finally solve them?

On December 5, 1945, five TBM Avenger torpedo bombers took off from Fort Lauderdale on a routine training mission—and were never seen again. Neither was the rescue plane sent to find them. We investigate the confusing radio transmissions, the frantic search efforts, and the competing theories about what really happened to the 27 men who vanished that day.