The Advanced General Aviation Technology Experiments (AGATE) Consortium was founded in 1994 by NASA, the U.S. Federal Aviation Admin. (FAA) and about 70 other members from industry, academia and other ...

Buyers select Nanhong agate stones in Xichang Nanhong agate market, Sichuan Province, in 2013. Photo: CFP The small hill in Meigu county, Southwest China's Sichuan Province is pitted with dozens of ...