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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/2973/ececa85a-32d2-4a93-82a1-bd702e50dbd9_hq.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Historic Kilogram Measure to Be Replaced' data-article-id='3516'><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='15000'>For nearly 130 years, the world&rsquo;s scientists have used a singular small, metal cylinder to define the exact weight of a kilogram.</span> <span data-start-time='15000' data-end-time='19458'>But that is about to change.</span> <span data-start-time='19458' data-end-time='29750'>The cylinder was made in 1889 of platinum and iridium metals.</span> <span data-start-time='29750' data-end-time='33375'>It is called the Grand K.</span> <span data-start-time='33375' data-end-time='45229'>The International Bureau of Weights and Measures, or BIPM, keeps the object at its headquarters near Paris.</span> <span data-start-time='45229' data-end-time='50604'>Many safeguards protect the Grand K.</span> <span data-start-time='50604' data-end-time='59750'>In fact, it takes three specially chosen people to open the container that holds the cylinder.</span> <span data-start-time='59750' data-end-time='67604'>They must each release separate locks at exactly the same time to do so.</span> <span data-start-time='67604' data-end-time='76792'>The Grand K has served as the official world measurement tool for weight in kilograms.</span> <span data-start-time='76792' data-end-time='83979'>All modern mass measurements have been based on the Grand K.</span> <span data-start-time='83979' data-end-time='88604'>There are seven main units of official measure.</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/2973/6BA6303E-2391-4057-AD5E-E5DDE007D0F5_cx5_cy14_cw88_w1023_r1_s.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=11959 data-hint-location='59750' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/what_is_a_lock.wav'>What is a lock?</div><div class='choices' data-correct-choice='device used to close a door that requires a key to open'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/device_used_to_close_a_door_that_requires_a_key_to_open.wav'><span>device used to close a door that requires a key to open</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/decide_on_a_course_of_action.wav'><span>decide on a course of action</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/dangerous.wav'><span>dangerous</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/defense.wav'><span>defense</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=11960 data-hint-location='45229' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/many_what_protect_the_grand_k.wav'>Many what protect the Grand K?</div><div class='choices' data-correct-choice='safeguards'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/moats.wav'><span>moats</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/alarms.wav'><span>alarms</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/safeguards.wav'><span>safeguards</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/guns.wav'><span>guns</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=11961 data-hint-location='83979' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/there_are_seven_main_units_of_official__blank_.wav'>There are seven main units of official <span class='blank'>measure</span>.</div><div class='choices' data-correct-choice='measure'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/food.wav'><span>food</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/presidents.wav'><span>presidents</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/money.wav'><span>money</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2973/measure.wav'><span>measure</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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