美国陆军部宣布与得克萨斯州 Southlake 的主要矿业公司 (Principal Mineral Company Inc.) 签订价值 3720 万美元的合同,使卡姆登铜业公司的总投资达到 7490 万美元,以振兴国内国防级电解铜箔的生产。
Super-Earths May Be Solid Deep Inside Their Mantles
New estimates show that a mineral likely common in these rocky planets’ interiors is resistant to melting, even at high temperatures.