In 1816, the world experienced something unthinkable: a year without summer. Mount Tambora's catastrophic eruption in Indonesia – the most powerful volcanic blast in recorded history – sent eighty times more ash than Mount St. Helens into the atmosphere, blocking sunlight globally and altering weather patterns worldwide. Thousands of miles from the volcano, people witnessed blood-red sunsets and snow falling in June. Crops failed, famine spread, and in the United States, entire populations migrated west to less-affected regions. The event reshaped America and built the Midwest into an agricultural hub. Join Emily Gracey and Brian Pietrus as they chat with Dr. Kevin Anchukaitis from the University of Arizona. He'll reveal how tree rings and paleoclimate data unlock this incredible story and explore Tambora's far-reaching effects on agriculture, migration, and even art.