Researchers have made the most in-depth estimate yet of the world’s ant population. The total number of these resourceful insects was estimated to be 20 quadrillion. A quadrillion is expressed with a one, followed by 15 zeros. The estimate means that there are about 2.5 million ants on Earth for every human. Ants have been on the planet since the dinosaur age. The oldest-known ant fossil dates back about 100 million years to the Cretaceous Period. There are more than 12,000 known species of ants. Generally, the insects are black, brown or red, with bodies divided into three parts. They range in size from about 1 millimeter to 3 centimeters long. They like living in soil and attaching themselves to plants.
Title: Scientists Estimate the Ant Population on Earth
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/5650/A26.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Scientists Estimate the Ant Population on Earth' data-article-id='6253'><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='8854'>Researchers have made the most in-depth estimate yet of the world’s ant population. </span> <span data-start-time='8854' data-end-time='17958'>The total number of these resourceful insects was estimated to be 20 quadrillion.</span> <span data-start-time='17958' data-end-time='25708'>A quadrillion is expressed with a one, followed by 15 zeros. </span> <span data-start-time='25708' data-end-time='35146'>The estimate means that there are about 2.5 million ants on Earth for every human.</span> <span data-start-time='35146' data-end-time='40958'>Ants have been on the planet since the dinosaur age. </span> <span data-start-time='40958' data-end-time='50771'>The oldest-known ant fossil dates back about 100 million years to the Cretaceous Period.</span> <span data-start-time='50771' data-end-time='56083'>There are more than 12,000 known species of ants. </span> <span data-start-time='56083' data-end-time='65292'>Generally, the insects are black, brown or red, with bodies divided into three parts. </span> <span data-start-time='65292' data-end-time='72167'>They range in size from about 1 millimeter to 3 centimeters long. </span> <span data-start-time='72167' data-end-time='78146'>They like living in soil and attaching themselves to plants.</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/5650/A26.jpeg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=18929 data-hint-location='40958' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/which_of_the_following_is_a_definition_of_the_word_fossil.wav'>Which of the following is a definition of the word fossil?</div><div class='choices' data-correct-choice='the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/the_remains_or_impression_of_a_prehistoric_organism_preserved_in_petrified_form_or_as_a_mold_or_cast_in_rock.wav'><span>the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/moving_or_capable_of_moving_at_high_speed.wav'><span>moving or capable of moving at high speed</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/either_of_two_small_masses_of_lymphoid_tissue_in_the_throat_one_on_each_side_of_the_root_of_the_tongue.wav'><span>either of two small masses of lymphoid tissue in the throat, one on each side of the root of the tongue</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/a_period_of_two_weeks.wav'><span>a period of two weeks</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=18930 data-hint-location='17958' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/how_many_zeros_are_in_a_quadrillion.wav'>How many zeros are in a quadrillion?</div><div class='choices' data-correct-choice='15'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/15.wav'><span>15</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/16.wav'><span>16</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/13.wav'><span>13</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/25.wav'><span>25</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=18931 data-hint-location='50771' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/there_are_more_than_12000_known__blank__of_ants_.wav'>There are more than 12,000 known <span class='blank'>species</span> of ants. </div><div class='choices' data-correct-choice='species'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/species.wav'><span>species</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/specials.wav'><span>specials</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/spleens.wav'><span>spleens</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5650/spectacles.wav'><span>spectacles</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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