July 1863 - The fate of a nation hung in the balance, Union and Confederate soldiers faced not only each other, but an unseen enemy that drained their strength with every passing hour - heat and humidity. Dr. Jon Nese is analyzing historical weather data and calculating the wet bulb globe temperature to get a better understanding of what those soldiers felt during that three day battle. We'll explore why revisiting historical climate data matters and how it can reshape our understanding of past events.

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