The Black Death & The Weather That Made It Possible

What if the deadliest pandemic in human history was partly triggered by a volcanic eruption no one knew about?

In this bonus episode, we trace the climate chain that led from an unidentified tropical volcano in 1345 to crop failures across Europe, desperate grain traders sailing into plague territory, and ultimately the Black Death — which killed 40 to 60 percent of Europe's population between 1347 and 1353.

All facts in this episode are drawn from peer-reviewed research, including a December 2025 study published in Communications Earth & Environment.

⏱️ TIMESTAMP BREAKDOWN
[00:00] Introduction — Weather and the deadliest pandemic in history
[00:45] What most people know about the Black Death
[01:30] The climate connection most people don't know
[02:15] The Medieval Warm Period ends — and the Little Ice Age begins
[03:00] The Great Famine of 1315–1317 — heavy rains, rotting crops, millions dead
[04:00] Tree ring and ice core evidence — three cold, wet summers before the plague
[05:00] Medieval physicians record the abnormal weather in 1348
[05:30] The volcanic cooling of 1345 and the grain trade chain reaction
[06:15] Central Asian rodent boom and collapse — how the bacterium reached Europe
[07:00] The full chain from volcano to plague — what the research shows
[07:25] Closing reflection

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