12-02-22 Astronomers using NASA's Chandra X-ray Observatory have clocked the fastest wind yet discovered blowing off a disk around a stellar-mass black hole. This result has important implications for understanding how this type of black hole behaves. The re...

10-06-04 Chinese researchers have successfully built an electromagnetic（电磁的） absorbing（吸引人的） device for microwave frequencies. The device, made of a thin cylinder（汽缸，圆筒） comprising 60 concentric rings of metamaterials（材料） , is capable o...