摘要
NASA是美国联邦政府的一个政府机构,负责美国的太空计划。最近,该机构称其在火星上发现甲烷的踪迹,这是否表明火星上已经有生命存在呢?让我们一起来看看吧!The United States space agency,NASA,said its Mars exploration vehicle recently recorded a high level of methane gas on the planet.The discovery is exciting because the presence of methane gas could support the case for life on Mars.
