On October 13, 1917, in a muddy field in Fátima, Portugal, tens of thousands of people gathered in the rain, waiting for a promised miracle from three shepherd children. What happened next defied explanation. According to witnesses, the sun danced in the sky, spun like a wheel of fire, and plunged toward the earth, drying the soaked crowd in an instant. Was it a genuine divine intervention, a rare atmospheric phenomenon, or a collective psychological event triggered by war, hunger, and desperation? In this episode of Unexplained History, host Tom McKenzie investigates the Miracle of the Sun. We explore the prophecies of the three children—Lucia, Francisco, and Jacinta—the secrets they guarded for decades, and the scientific theories attempting to rationalize the impossible. From the "Third Secret" locked away in the Vatican to the chilling details of that October day, we unravel the mystery that still divides believers and skeptics a century later.