Pictures spoke to me louder than words today. This image came from a fascinating article in Wired Science about a 19th-century DIY X-ray craze:
In 1895, Wilhelm Conrad Roentgen discovered the X-ray, a form of electromagnetic radiation with a very short wavelength. To the common people at the time, this was astonishing. Within three months, DIY X-ray kits were available on the market. The rich and famous had their hands X-rayed, their skeletons draped in rings. Photographers, who had access to most of the tools needed to make the images, began to train this new form of light on just about anything that might be beautiful."