American researchers have a new theory about how an object struck the Earth and caused the dinosaurs to die off. Scientists mostly agree on where the impact happened about 65 million years ago. They say a huge object struck an area off the coast of what is now Mexico. Astronomers have said the most likely cause of the strike was either an asteroid or a comet. In recent years, researchers have presented evidence that the impact was caused by an asteroid. The theory suggests the asteroid came from an area between the orbits of Mars and Jupiter. But a study by two astronomers from Harvard University presents a new theory, that the crash was caused by a comet. The researchers say the comet came from an area containing icy debris on the edge of the solar system. The area is known as the Oort cloud. Their theory states that the comet was pulled into the solar system by Jupiter’s gravity. The comet then came very close to the sun, whose tidal force caused it to break up into pieces. The researchers believe one of the pieces crashed into the place that scientists have identified in Mexico.
Title: Scientists Have New Theory for What Killed the Dinosaurs
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/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’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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