LOWER SAXONY, GERMANY—Deutsche Welle reports that a construction project in the city of Osnabrück has unearthed copper artifacts, including three pieces of jewelry and an ax. The objects are thought to date to the end of the Neolithic period, between 4,500 and 4,000 years ago. Conservators will clean and restore the items, and researchers will try to determine if they could be some of the oldest metal artifacts in Europe. For more, go to "The Neolithic Toolkit."