日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

  Home>News Center>World
         
 

NASA: Mars had enough water for life
(Agencies)
Updated: 2004-03-03 23:39

Water percolating through the soil once created a friendly environment that would have been ideal for life to flourish on Mars, NASA scientists say.

It is not known how long this environment lasted or if any organisms actually developed, but scientists directing robot rovers prowling the Martian surface said on Tuesday the evidence now is clear that some rocks "were once soaked with liquid water."


An image released by NASA officials on Tuesday includes details of the planet Mars they said show evidence of water. [Reuters]

"The ground would have been suitable for life," said Steve Squyres of Cornell University, the lead investigator for science instruments on the rover Opportunity. "That doesn't mean life was there. We don't know that."

Mars now is cold and dry and there is no apparent evidence of life on its barren surface.

But Squyres said chemical and geological clues gathered by Opportunity give dramatic proof that at some time in its past, liquid water coursed over the rocks and soils.

Such conditions on Earth, Squyres said at a news conference, "would be capable of supporting life.

"We believe that place on Mars for some period of time was a habitable environment," he said.

Squyres said it is not known how long the environment capable of supporting life lasted, if the water collected in surface pools or underground, and when in the long history of Mars the liquid water existed. Answers to those questions, he said, probably will require missions that scoop up Martian samples and bring them to laboratories on Earth.

NASA researchers from the Jet Propulsion Laboratory in Pasadena, California, who are guiding the exploration of Mars by Opportunity and its twin, Spirit, said the primary goal of the rover mission was to find evidence of Martian water.

That goal was accomplished, they said on Tuesday, when Opportunity used all of its instruments to study a fine, layered rock called El Capitan. The rock is embedded in the wall of the crater where the six-wheeled robot began its journey on Mars.

 
  Today's Top News     Top World News
 

Pakistanis may be near bin Laden's aide al-Zawahri

 

   
 

Government relaxes control of airfares, finally

 

   
 

U.S. launches WTO complaint against China

 

   
 

Report: China, Iran sign US$20b gas deal

 

   
 

FM to pay official visit to DPRK

 

   
 

S. Korea won't send troops to Iraqi city

 

   
  Sources: Al Qaeda No 2 leader surrounded
   
  S. Korea won't send troops to Iraqi city
   
  Powell visits Iraq on eve of anniversary of US invasion
   
  US doubles reward for capture of bin Laden
   
  Poland 'misled' on Iraq, President says
   
  Kosovo death toll rises to 31
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  News Talk  
  The Human Rights Record of the United States in 2003  
Advertisement
         
主站蜘蛛池模板: 国产亚洲精品码 | 国产精品一区二区在线 | 日本黄色短视频 | 国产99久久久国产精品免费看 | 欧美日韩精品在线观看 | 国内外成人免费视频 | 成人资源在线观看 | 99国产精品久久久 | 日本黄页网站免费大全 | 国产真实乱在线更新 | 午夜寂寞影院在线观看 | 国产精品视频播放 | 色玖玖 | 欧美日韩无 | 亚洲成人久 | 在线免费中文字幕 | 国内精品久久久久久久久 | 麻豆网址 | 中文天堂在线观看 | 综合久久色 | 久久18| 久久视频免费看 | 精品一区二区三区四区 | 日韩高清精品免费观看 | 色狠狠综合网 | 青青草一区二区三区 | 色婷婷激情 | 一区二区视频在线观看 | 国产乱妇4p交换乱免费视频 | 日韩在线视频中文字幕 | 国产精品自拍视频 | 日日夜夜网站 | 视频一区二区三区四区五区 | 在线观看中文字幕一区 | 一区二区三区视频在线 | 97超碰97| 你懂的国产在线 | 超碰一区二区 | 国产女人18毛片18精品 | 欧美激情精品久久久久久蜜臀 | 成年人视频在线免费观看 |