The whirling, 3,200-pound puffing gun was used to produce cereals like Cheerios and Kix in the early 20th century. The Museum of Food and Drink plans to feature it in its first exhibition, on breakfast cereal. Courtesy of MOFAD hide caption

itoggle caption Courtesy of MOFAD

A necklace of Saint Januarius, in gold, silver and precious stones, is displayed in Rome. The riches are from a treasure trove in Naples that is said to be worth more than the British crown jewels. Gabriel Buoys/AFP/Getty Images hide caption

itoggle caption Gabriel Buoys/AFP/Getty Images

Cosmo Wenman generated this 3-D model of the Ares Borghese, based on hundreds of photos, from the Basel Sculpture Hall. Wenman publishes the scans online, so that anyone can use them to 3-D print a replica of the masterpiece. Courtesy of Cosmo Wenman hide caption

itoggle caption Courtesy of Cosmo Wenman

Oprah Winfrey gave $12 million Tuesday to help build the Smithsonian's new National Museum of African American History and Culture, seen here in a scale model (lower center). The facility is expected to open in 2015. Allison Keyes/NPR hide caption

itoggle caption Allison Keyes/NPR

One of the highlights of the new China Art Palace in Shanghai is a giant digital rendering of a famous ancient scroll, "Along the River During Qingming Festival," which includes figures that walk and talk. The work was first presented at the 2010 World Expo in Shanghai. Frank Langfitt/NPR hide caption

itoggle caption Frank Langfitt/NPR