From late 535 AD to 536, written records from across the world suggest a mysterious climate catastrophe. Dubbed the year "without a summer", the sun was completely dimmed and shadows were invisible even at noon. The cause of of the "worst year to be alive in history" has been long uncertain. Was it a comet? An asteroid? A volcano? Archaeologist David Keys reveals the latter is to blame for the Dark Ages of famine and plague that shaped the world order of today. Welcome to Chronicle; your home for all things medieval history! With documentaries covering everything from the collapse of the Roman Empire to the beginnings of the Renaissance, from Hastings to Charlemagne, we'll be exploring everything the Middle Ages have to offer. Subscribe now so you don't miss out! Chronicle is part of the History Hit Network. To get in touch please email owned-enquiries@littledotstudios.com. It's like Netflix for history... 📺 Sign up to History Hit, the world's best history documentary service and get 50% off using the code 'CHRONICLE' 👉 https://bit.ly/3iVCZNl