Description: [edan-image:id=siris_sic_13918,size=350,right] Postcards, as we are familiar with them today, have taken a considerable amount of time to develop. First restricted by size, color, and other regulations, postcard production blossomed in the late 1800s and early 1900s. Postcards were popular because they were a quick and easy way for individuals to communicate with each other.
Description: [edan-image:id=siris_arc_287602,size=250,left]As a child in England in the 1930s, Oliver Sacks enjoyed playing with his Uncle Abe’s spinthariscope. It was, he would later recall, “a beautifully simple instrument, consisting of a fluorescent screen and a magnifying eyepiece, and inside, an infinitesimal speck of radium.We take a look at the spinthariscope at the Smithsonian.