The best German scientists are leaving the country for research positions elsewhere, and too many of them don't return, according to a new report by the government's Expert Commission on Research and Innovation. Between 1996 and 2011, 19,000 researchers came to Germany, but 23,000 have gone abroad, the report found. Of particular concern, the commission said that the quality of those leaving the country (based on citations of work) was higher than those coming to Germany. "The best migrate, but rarely return to Germany. They remain attracted by research destinations abroad," the report said. The full report, available in German, may be found here.