手机APP下载

您现在的位置: 首页 > 英语听力 > 国外媒体资讯 > 自然百科 > 正文

探索世界奥秘之Life On Mars(火星生命)Unit03

来源:本站原创 编辑:echo   可可英语APP下载 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out.

We know that conditions on Mars today are not very good for life. If you were to go out on the Mars without a spacesuit, I don't recommend it. But if you were, what would happen is your body fluids would literally start to boil, because vapor pressure on Mars is lower than the boiling point of water at body temperature. So this would not be a very good thing in terms of your ears, eyes, nose and throat. You would quickly suffocate and essentially drown in your own bodily fluid."

It was clear that Mars could not be home to advanced life forms. For a while it meant that perhaps we were alone after all. Mars, it seemed, was a dead end. It wasn't until years later during expeditions in the 70s that they saw that the image of Mars as a dead planet was not quite right.

After a while when people start thinking about it though, you look more into it, then you start realizing “Well, yeah, it is desolate. It's very dry.” But you know there are other things going on.

Volcanoes and explosions had clearly once torn across this planet, leaving the surface pockmarked and scarred. Far from being dead, Mars had all the features of once being very much alive.

We started seeing all these incredible things.

It has mountains there bigger than any mountains on Earth. It's got canyons that are bigger than the Grand Canyon.

All these volcanoes, parts of Mars was cratered, parts weren't.

It's got tremendous altitude variations over the surface of the planet. It's just a very rich environment.

So that was a very exciting, exciting time. I was surprised by almost everything.

It wasn't just the geology of Mars that was surprising. It also contained all the basic ingredients for life.

Here was a planet that had all the elements needed for life, carbon, oxygen, nitrogen, sunlight. And yet there was no clear evidence of life. To me this was a mystery story; it was a sort of lights-are-on-but-nobody's-home result.

So life could form on Mars. There's nothing there preventing it. We do have the basic building blocks.

body fluid: a natural bodily fluid or secretion of fluid such as blood, semen, or saliva; total body water, contained principally in blood plasma and in intracellular and interstitial fluids

vapor pressure: the pressure exerted by a vapor in equilibrium with its solid or liquid phase

pockmarked: marked by smallpox; pitted

重点单词   查看全部解释    
contained [kən'teind]

想一想再看

adj. 泰然自若的,从容的;被控制的 v. 包含;遏制

 
planet ['plænit]

想一想再看

n. 行星

 
harsh [hɑ:ʃ]

想一想再看

adj. 粗糙的,使人不舒服的,刺耳的,严厉的,大约的

 
pressure ['preʃə]

想一想再看

n. 压力,压强,压迫
v. 施压

联想记忆
environment [in'vaiərənmənt]

想一想再看

n. 环境,外界

 
vapor ['veipə]

想一想再看

n. 蒸汽

 
mystery ['mistəri]

想一想再看

n. 神秘,秘密,奥秘,神秘的人或事物

 
equilibrium [.i:kwi'libriəm]

想一想再看

n. 平衡,均衡

联想记忆
incredible [in'kredəbl]

想一想再看

adj. 难以置信的,惊人的

 
temperature ['tempritʃə(r)]

想一想再看

n. 温度,气温,体温,发烧

 


关键字:

发布评论我来说2句

    最新文章

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。