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Scientists Now Certain There Is Water On Mars

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NEWSSCIENCE

Scientists Now Certain There Is Water On Mars


Scientists at NASA (the National Aeronautics and Space Administration) announced last week that they have found evidence of liquid water on Mars. The discovery has given scientists new hope that some form of life might exist on the planet.

Scientists believe that Mars once had rivers, lakes and oceans, but they thought that any remaining water was now frozen solid in polar ice caps.
Dr. Alfred McEwen studies photographs of the planet’s surface taken by a NASA spacecraft that orbits Mars. He and his team of researchers noticed that in some of the images there were dark streaks running down the sides of mountains and craters.
The streaks changed in size and colour depending on the time of year. They were longer and darker in the summer, and faded when the temperature cooled.
The scientists thought the streaks might be caused by water freezing and thawing as the seasons changed.
They used another instrument on the orbiting spacecraft to study the streaks. The instrument—called a spectrometer—can identify types of molecules based on which colours of light they absorb.
The spectrometer told them that the dark streaks were patches of soil containing hydrated salts—salt molecules that had soaked up water. Salt molecules would help keep water liquid at a lower temperature, in the same way salt helps to melt ice on sidewalks in the winter here on Earth.
Scientists believe water is necessary for living things, so they thought Mars was too cold and dry to support life. Now they think it’s possible that some form of microscopic life could exist in these damp patches of soil.
Finding these microorganisms could be difficult, however. The robotic devices that are currently being used to explore Mars are not allowed to go near the wet areas because scientists are afraid they might be carrying microbes from Earth. These microbes could contaminate any Martian life they might find.
Scientists are now looking at ways to sample the damp soil from a distance, possibly by using lasers. They are also considering sending up a spacecraft that has been sterilized to destroy any microbes from Earth.

Comments

  1. This comment has been removed by the author.

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  2. I learnt that Mars are not allowed to go near the wet areas because scientists are afraid they might be carrying microbes from earth, wow I cant believe there is water on mars.

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  3. What I Learned
    I learned that scientist believe they have find river, ocean and lake that once use to be on Mars but scientist believe remaining water are now frozen in polar ice cap.

    Soteara

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  4. This piece of writing is really interesting. It is about a man from NASA found out last week that they have found some evidence that is a sign meaning they is water on mars!!
    next planet here we come!!

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  5. i have learned that there may have Ben water on mars
    the scientist believe that they have found water from a river
    Chyenne

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  6. I learnt that scientists have found water in Mars and they think that human form can exist in Mars . But in my opinion I think that no one will live in Mars because it says in the bible you can not escape the last day.

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  7. What I learned:

    Mars have soil that have a chance of support life because of the salt minuscules in them.

    - Sophie

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  8. I have learned that there is water in mars and they think that humans can exist on Mars

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  9. well even in Mars there may be water of course but we can't be sure you know. It might've been an asteroid hit Mars or something hit Mars surface and rose the water into the surface.

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  10. I have learnt that scientist believe that mars once had lakes, rivers and oceans. Wow scientist believe water is necessary for living things so they thought mars was to cold and dry to support life.

    ReplyDelete

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