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<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/4919/A.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Scientists Have New Theory for What Killed the Dinosaurs' data-article-id='5443'><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='11354'>American researchers have a new theory about how an object struck the Earth and caused the dinosaurs to die off.</span> <span data-start-time='11354' data-end-time='20771'>Scientists mostly agree on where the impact happened about 65 million years ago.</span> <span data-start-time='20771' data-end-time='29604'>They say a huge object struck an area off the coast of what is now Mexico.</span> <span data-start-time='29604' data-end-time='39938'>Astronomers have said the most likely cause of the strike was either an asteroid or a comet.</span> <span data-start-time='39938' data-end-time='49896'>In recent years, researchers have presented evidence that the impact was caused by an asteroid.</span> <span data-start-time='49896' data-end-time='59063'>The theory suggests the asteroid came from an area between the orbits of Mars and Jupiter.</span> <span data-start-time='59063' data-end-time='71271'>But a study by two astronomers from Harvard University presents a new theory, that the crash was caused by a comet.</span> <span data-start-time='71271' data-end-time='81354'>The researchers say the comet came from an area containing icy debris on the edge of the solar system.</span> <span data-start-time='81354' data-end-time='86167'>The area is known as the Oort cloud.</span> <span data-start-time='86167' data-end-time='94625'>Their theory states that the comet was pulled into the solar system by Jupiter&rsquo;s gravity.</span> <span data-start-time='94625' data-end-time='103958'>The comet then came very close to the sun, whose tidal force caused it to break up into pieces.</span> <span data-start-time='103958' data-end-time='114104'>The researchers believe one of the pieces crashed into the place that scientists have identified in Mexico.</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/4919/A.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=16899 data-hint-location='39938' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/what_is_an_asteroid.wav'>What is an asteroid?</div><div class='choices' data-correct-choice='small, rocky objects that orbit the Sun'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/small_rocky_objects_that_orbit_the_sun.wav'><span>small, rocky objects that orbit the Sun</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/dinosaur_fossils.wav'><span>dinosaur fossils</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/the_tip_of_a_rocket.wav'><span>the tip of a rocket</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/stars.wav'><span>stars</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=16900 data-hint-location='11354' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/about_when_did_the_impact_that_killed_off_the_dinosaurs_take_place.wav'>About when did the impact that killed off the dinosaurs take place?</div><div class='choices' data-correct-choice=' 65 million years ago'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/_65_billion_years_ago.wav'><span> 65 billion years ago</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/_5_billion_years_ago.wav'><span> 5 billion years ago</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/_65_million_years_ago.wav'><span> 65 million years ago</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/20_million_years_ago.wav'><span>20 million years ago</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=16901 data-hint-location='59063' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/the_two_astronomers_with_a_new_theory_about_the_demise_of_dinosaurs_are_from__blank_.wav'>The two astronomers with a new theory about the demise of dinosaurs are from <span class='blank'>Harvard University</span>.</div><div class='choices' data-correct-choice='Harvard University'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/yale_university.wav'><span>Yale University</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/harvard_university.wav'><span>Harvard University</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/the_smithsonian.wav'><span>the Smithsonian</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4919/nasa.wav'><span>NASA</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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