Scientists have discovered some of the oldest stone tools ever found at a research site in Kenya. But the find created a mystery about which group of early humans made and used the tools. A study recently published in Science suggests early humans used the tools to cut up animals for food about 3 million years ago. In the past, scientists thought our direct ancestors were the ones making and using tools. But two teeth from an extinct human-like creature were found at the site. This led researchers to believe that other kinds of hominins might have picked up tools too. The term hominin is still developing and is used to describe species that are considered human or closely linked to humans. The team said the newly found tools are probably the oldest example of what is known as the Oldowan toolkit. This was a set of tools that spread across Africa and beyond during the Stone Age.
Title: Stone Age Tool Discovery Raises Questions about Who Used Them
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/5807/A27.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Stone Age Tool Discovery Raises Questions about Who Used Them' data-article-id='6413'><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='10063'>Scientists have discovered some of the oldest stone tools ever found at a research site in Kenya.</span> <span data-start-time='10063' data-end-time='20167'>But the find created a mystery about which group of early humans made and used the tools.</span> <span data-start-time='20167' data-end-time='33875'>A study recently published in Science suggests early humans used the tools to cut up animals for food about 3 million years ago.</span> <span data-start-time='33875' data-end-time='42833'>In the past, scientists thought our direct ancestors were the ones making and using tools. </span> <span data-start-time='42833' data-end-time='49688'>But two teeth from an extinct human-like creature were found at the site. </span> <span data-start-time='49688' data-end-time='58979'>This led researchers to believe that other kinds of hominins might have picked up tools too.</span> <span data-start-time='58979' data-end-time='70896'>The term hominin is still developing and is used to describe species that are considered human or closely linked to humans.</span> <span data-start-time='70896' data-end-time='82063'>The team said the newly found tools are probably the oldest example of what is known as the Oldowan toolkit. </span> <span data-start-time='82063' data-end-time='89958'>This was a set of tools that spread across Africa and beyond during the Stone Age.</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/5807/A27.jpeg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=19276 data-hint-location='42833' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/which_of_the_following_is_a_definition_of_the_word_extinct.wav'>Which of the following is a definition of the word extinct?</div><div class='choices' data-correct-choice='not existing anymore'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/not_existing_anymore.wav'><span>not existing anymore</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/having_a_strong_odor.wav'><span>having a strong odor</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/believing_in_ghosts.wav'><span>believing in ghosts</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/a_former_romantic_partner.wav'><span>a former romantic partner</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=19277 data-hint-location='0' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/in_which_african_country_were_the_stone_tools_found.wav'>In which African country were the stone tools found?</div><div class='choices' data-correct-choice='Kenya'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/ethiopia.wav'><span>Ethiopia</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/kenya.wav'><span>Kenya</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/ghana.wav'><span>Ghana</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/congo.wav'><span>Congo</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=19278 data-hint-location='82063' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/this_was_a_set_of_tools_that_spread_across_africa_and_beyond_during_the__blank__age.wav'>This was a set of tools that spread across Africa and beyond during the <span class='blank'>Stone</span> Age.</div><div class='choices' data-correct-choice='Stone'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/scone.wav'><span>Scone</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/ice_cream_cone.wav'><span>Ice Cream Cone</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/phone.wav'><span>Phone</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5807/stone.wav'><span>Stone</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button 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