The 4th Photo History Intersession looks at two rather dramatically opposed technical applications of photography: The first X-Ray image, made by Wilhelm Röntgen in 1896 and the first auroral (northern lights) photograph made by Martin Brendel in 1892.
(left) First X-Ray image by Wilhelm Röntgen – 1896 & (right) First auroral (northern lights) photograph by Martin Brendel (1892)