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.
Description: A twentieth century Renaissance man, Louis R. Purnell lived a remarkable life. His career began in the skies above Italy and Germany, where he flew 88 combat missions as an original member of the Tuskegee Airmen. After the war, while working at the National Museum of Natural History, he traveled the world’s oceans collecting marine specimens, taught himself geology and