In the year 536 AD, historical records from across Europe, Asia, and the Middle East describe a mysterious and devastating event: the sun dimmed, temperatures dropped, and for over a year, daylight was faint—if visible at all. Crops failed. Widespread famine and disease followed. Many believed the world was ending. Modern researchers link this event to a massive volcanic eruption, possibly in Iceland or North America, that sent ash and sulfur particles into the upper atmosphere, creating a “volc