A new study suggests that dark markings on the planet Mars represent sand, not water. Research in 2015 had suggested that lines on some Martian hills were evidence of water. Yet American scientists now say these lines appear more like dry, steep flows of sand. If water is present, they said, it is likely to be a small amount. Water in liquid form would be necessary for microbial life. NASA, the American space agency, said more research is needed.
Title: Is Water Really on Mars?
Content: <div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/water_on_mars.m4a' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Is Water Really on Mars?' data-article-id='2776'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='9188'>A new study suggests that dark markings on the planet Mars represent sand, not water.</span> <span data-start-time='9188' data-end-time='18771'>Research in 2015 had suggested that lines on some Martian hills were evidence of water.</span> <span data-start-time='18771' data-end-time='28688'>Yet American scientists now say these lines appear more like dry, steep flows of sand.</span> <span data-start-time='28688' data-end-time='35375'>If water is present, they said, it is likely to be a small amount.</span> <span data-start-time='35375' data-end-time='41667'>Water in liquid form would be necessary for microbial life.</span> <span data-start-time='41667' data-end-time='48313'>NASA, the American space agency, said more research is needed.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/2260/water_on_mars.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=9831 data-hint-location='35375' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/what_does_microbe_mean.m4a'>What does microbe mean?</div><div class='choices' data-correct-choice='small life form'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/liquid_water.m4a'><span>liquid water</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/flows_of_sand.m4a'><span>flows of sand</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/small_life_form.m4a'><span>small life form</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/planetary_water.m4a'><span>planetary water</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=9832 data-hint-location='18771' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/what_do_the_lines_look_like.m4a'>What do the lines look like?</div><div class='choices' data-correct-choice='flows of sand'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/small_life_forms.m4a'><span>small life forms</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/flows_of_sand.m4a'><span>flows of sand</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/chunks_of_ice.m4a'><span>chunks of ice</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/rivers_of_water.m4a'><span>rivers of water</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=9833 data-hint-location='9188' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/research_suggested_that_lines_were_evidence_of__blank_.m4a'>Research suggested that lines were evidence of <span class='blank'>water</span>.</div><div class='choices' data-correct-choice='water'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/ice.m4a'><span>ice</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/microbes.m4a'><span>microbes</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/sand.m4a'><span>sand</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2260/water.m4a'><span>water</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button class='speak-button'></button></div></div></div>
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