(文本为视频大致内容,可能与视频并非完全一致,欢迎大家贡献听写稿^^)

NASA scientists believe they've discovered flowing water on Mars which may have the ability to sustain living organisms. In the middle latitudes of the planet's southern hemisphere, water appears to flow off the edges of craters. Dark, finger-like features appear to extend down some Martian slopes during late spring through summer, before fading in winter and returning the following spring.

Repeated observations have tracked the seasonal changes in these recurring features on several steep slopes. The water is thought to be salty and therefore highly resistant to freezing at normal mid-latitude Martian temperatures. While scientists have had evidence of water on Mars for years, the previous general conclusion was that it was all frozen. This is the first time there is evidence that the water is occasionally flowing.

声明:音视频均来自互联网链接,仅供学习使用。本网站自身不存储、控制、修改被链接的内容。"沪江英语"高度重视知识产权保护。当如发现本网站发布的信息包含有侵犯其著作权的链接内容时,请联系我们,我们将依法采取措施移除相关内容或屏蔽相关链接。