Description: In honor of the anniversary of the discovery of x-rays, a look inside the Foucault pendulum that used to hang at the National Museum of American History.
Description: [caption id="" align="aligncenter" width="305" caption="Award-winning artist-in-residence at the National Museum of Natural History, Don Tenoso (Hunkpapa), with three of his Lakota dolls, is crouching in a niche outside the National Museum of Natural History above a sign that reads "Smithsonian Institution National Museum of Natural History and National Museum of Man," 1991,