The Five-hundred-metre Aperture Spherical Radio Telescope (FAST) is seen on its first day of operation in Pingtang, in southwestern China's Guizhou province on September 25, 2016. The world's largest radio telescope began operating in southwestern China on September 25, a project which Beijing says will help humanity search for alien life. / AFP / STR / China OUT (Photo credit should read STR/AFP/Getty Images)
