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/* mediaQueries.mdOrLarger */{._ae3kwy7{-webkit-flex:1 0 50% !important;-ms-flex:1 0 50% !important;flex:1 0 50% !important;padding-right:40px !important;display:none !important;}}@media screen and (min-width: 1024px) /* mediaQueries.lgOrLarger */{._ae3kwy7{-webkit-flex:1 0 33% !important;-ms-flex:1 0 33% !important;flex:1 0 33% !important;padding-right:40px !important;display:-webkit-box !important;display:-moz-box !important;display:-ms-flexbox !important;display:-webkit-flex !important;display:flex !important;}}@media screen and (max-width: 767px) /* mediaQueries.smOrSmaller */{._ae3kwy7{-webkit-flex:1 0 100% !important;-ms-flex:1 0 100% !important;flex:1 0 100% !important;padding-right:0px !important;margin-left:-4px !important;margin-right:-4px !important;min-height:56px !important;height:56px !important;display:none !important;}}._wvjbru{-webkit-box-pack:center !important;-ms-flex-pack:center !important;-webkit-box-align:center !important;-ms-flex-align:center 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class="user-summary-view__points-and-badges" data-webtasks-id="3f475769-c94b-4bc9"><span class="energy-points-container" title="1,307 energy points" data-webtasks-id="70f403cf-999f-4bd5"><span class="energy-points-badge fixed-width" data-webtasks-id="6a6a742c-c6a9-439c"><span class="odometer odometer-theme-minimal" data-webtasks-id="b3faed4d-90fe-44cd"><div class="odometer-inside" data-webtasks-id="6bba7966-f0d8-419b"><span class="odometer-digit" data-webtasks-id="a1edc62b-8a96-4bfb"><span class="odometer-digit-spacer" data-webtasks-id="9b0499c8-2d32-4a7b">8</span><span class="odometer-digit-inner" data-webtasks-id="59ddc80d-7db4-4711"><span class="odometer-ribbon" data-webtasks-id="78e04041-7f61-400a"><span class="odometer-ribbon-inner" data-webtasks-id="7a46fcdf-ce35-4a74"><span class="odometer-value" data-webtasks-id="8bb757a0-2a9e-457b">1</span></span></span></span></span><span class="odometer-formatting-mark" data-webtasks-id="b26ec426-5fc8-43d6">,</span><span class="odometer-digit" data-webtasks-id="545e63bd-c98c-4a9a"><span class="odometer-digit-spacer" data-webtasks-id="d958408e-7946-4283">8</span><span class="odometer-digit-inner" data-webtasks-id="c825fe3b-2090-46df"><span class="odometer-ribbon" data-webtasks-id="5348c331-3cd6-4894"><span class="odometer-ribbon-inner" data-webtasks-id="72216711-53a1-4845"><span class="odometer-value" data-webtasks-id="a674e645-8ed7-400c">3</span></span></span></span></span><span class="odometer-digit" data-webtasks-id="23025c12-6320-48b9"><span class="odometer-digit-spacer" data-webtasks-id="62003cf3-6b33-4eac">8</span><span class="odometer-digit-inner" data-webtasks-id="50214e20-2e47-45e3"><span class="odometer-ribbon" data-webtasks-id="659e1f5f-836d-497d"><span class="odometer-ribbon-inner" data-webtasks-id="c116a05f-082d-4fe8"><span class="odometer-value" data-webtasks-id="fc07cdd5-d6c1-4bc7">0</span></span></span></span></span><span class="odometer-digit" data-webtasks-id="31e1cbf5-b41f-45c2"><span class="odometer-digit-spacer" data-webtasks-id="8e3f0334-0602-4632">8</span><span class="odometer-digit-inner" data-webtasks-id="1dd8afca-6611-44f1"><span class="odometer-ribbon" data-webtasks-id="a6349c61-d00f-440e"><span class="odometer-ribbon-inner" data-webtasks-id="afab638e-c6d6-445d"><span class="odometer-value" data-webtasks-id="fa238067-4f88-4185">7</span></span></span></span></span></div></span></span></span><span data-webtasks-id="4982263e-cb33-402f"></span><div class="user-summary-view__points-and-badges__badges" data-webtasks-id="df2ed83d-d978-4411"><a class="profile-badge-count-container visited-no-recolor" title="0 badges total." href="/profile/kaid_662450128763704713107830/badges" data-webtasks-id="2fd460d4-5a92-46a4"><span class="badge-category" aria-hidden="true" data-webtasks-id="f6ace359-5fb2-4be7"><span class="badge-img-small badge-master-img-small" data-webtasks-id="16b325a2-0aff-4452"></span> <span class="badge-count" data-webtasks-id="30656471-9012-4ee4">0</span></span><span class="badge-category" aria-hidden="true" data-webtasks-id="942e3bd4-ff93-4473"><span class="badge-img-small badge-platinum-img-small" data-webtasks-id="78c92dd4-a69d-47d3"></span> <span class="badge-count" data-webtasks-id="ccff5010-e229-4d42">0</span></span><span class="badge-category" aria-hidden="true" data-webtasks-id="6f23040a-6ce6-42a6"><span class="badge-img-small badge-diamond-img-small" data-webtasks-id="b2ea7523-8290-432f"></span> <span class="badge-count" data-webtasks-id="2e038bf5-c514-4e6a">0</span></span><span class="badge-category" aria-hidden="true" data-webtasks-id="1bf13b87-3e54-4396"><span class="badge-img-small badge-gold-img-small" data-webtasks-id="509422db-490d-44ce"></span> <span class="badge-count" data-webtasks-id="2fbb5ee2-f16c-4d3a">0</span></span><span class="badge-category" aria-hidden="true" data-webtasks-id="704db560-0b39-48d6"><span class="badge-img-small badge-silver-img-small" data-webtasks-id="31399894-0a24-4f9f"></span> <span class="badge-count" data-webtasks-id="06ad78a6-121b-4d6d">0</span></span><span class="badge-category" aria-hidden="true" data-webtasks-id="ba8759cd-0765-4ce8"><span class="badge-img-small badge-bronze-img-small" data-webtasks-id="21fa2fa4-fb04-4372"></span> <span class="badge-count" data-webtasks-id="4e895f6c-ad57-48c8">0</span></span><span class="sr-only" data-webtasks-id="81547b29-497d-4550">0 badges total.</span></a></div></div></div></div></div></div></div><div class="_xu2jcg" data-webtasks-id="b3b3b98a-dfa9-4c2a"><div class="_1qrrvqo8" data-webtasks-id="3d6cfdde-6066-4e00"><div aria-hidden="true" class="_1qxywlbt" data-webtasks-id="d7fdee83-21e3-467b"></div><div class="_6xyn8lv" data-webtasks-id="86ead4cf-77f7-4ac9"><nav class="_1yfus1e" data-test-id="side-nav" aria-label="user profile navigation" data-webtasks-id="53190586-cec1-44f4"><section class="_1ozlbq6" data-webtasks-id="d74320a4-329f-42d3"><h2 class="_18undph9" 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data-webtasks-id="f3f32180-6a93-4a2e"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/arts_humanities.png-07c77b-128c.png" class="_1qjkefo" data-webtasks-id="f6548e96-675c-4968"></div><div class="_9t9e7d" data-webtasks-id="acf8b650-1ebf-4363"><div class="_1xz0fezn" data-webtasks-id="0ac7e08d-bfdd-4851">Special topics in art history</div></div></a><div class="_106eiejf" data-webtasks-id="13f4bd83-eeb5-49f7"><div class="_xu2jcg" data-webtasks-id="5f1010d3-e675-4f2b"><div class="_2p63cnw" data-webtasks-id="5313739b-2f0c-4daf"><a data-test-id="start-right" id="uid-popover-0-wb-id-anchor" role="button" aria-controls="uid-popover-0-wb-id" aria-expanded="false" class="_1448c3ub" href="/humanities/special-topics-art-history" data-webtasks-id="8495e807-6264-4c47"><span class="_90x24ln" data-webtasks-id="f0c7c602-a4c9-4c09">Start</span></a></div><div class="_vd38ksx" data-webtasks-id="634aa852-b9f3-4554"><a data-test-id="start-bottom" id="uid-popover-1-wb-id-anchor" role="button" aria-controls="uid-popover-1-wb-id" aria-expanded="false" class="_1448c3ub" href="/humanities/special-topics-art-history" data-webtasks-id="b71a2da4-1365-4686"><span class="_90x24ln" data-webtasks-id="7484acd6-b56f-4087">Start</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="22401ad7-d182-48f1"><div class="_1e8pns9" data-webtasks-id="65a267ab-87a2-4094" style="color: rgb(190, 38, 18);"><a aria-label="The Seeing America Project" class="_1ex1wlka" href="/humanities/seeing-america-sh" data-webtasks-id="d6275892-3b81-43b1"><div class="_1gyxjpg" data-webtasks-id="06971a0d-7c74-4dff"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/arts_humanities.png-07c77b-128c.png" class="_1qjkefo" data-webtasks-id="22eab620-692a-40b6"></div><div class="_9t9e7d" data-webtasks-id="5f748b8e-1626-4e50"><div class="_1xz0fezn" data-webtasks-id="72bf5081-6d15-466e">The Seeing America Project</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="77ec8af7-227b-45a2"><div class="_1e8pns9" data-webtasks-id="85784f1b-1da0-475e" style="color: rgb(190, 38, 18);"><a aria-label="Start here" class="_1ex1wlka" href="/humanities/approaches-to-art-history" data-webtasks-id="26f06313-a4e4-402c"><div class="_1gyxjpg" data-webtasks-id="4864263e-0b00-47fa"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/arts_humanities.png-07c77b-128c.png" class="_1qjkefo" data-webtasks-id="2fcab4db-230a-48d3"></div><div class="_9t9e7d" data-webtasks-id="eeb04abb-5c1c-405e"><div class="_1xz0fezn" data-webtasks-id="8b9e1bd6-9cfa-4c0c">Start here</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="b422c205-2a38-49d3"><div class="_1e8pns9" data-webtasks-id="4163d3b6-c1a8-4024" style="color: rgb(190, 38, 18);"><a aria-label="Prehistoric art" class="_1ex1wlka" href="/humanities/prehistoric-art" data-webtasks-id="e0e4edb0-8414-4373"><div class="_1gyxjpg" data-webtasks-id="75476b56-5b1a-437a"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/prehistoric_art.jpg-ffc751-128c.jpeg" class="_1qjkefo" data-webtasks-id="d196dc30-16a8-4049"></div><div class="_9t9e7d" data-webtasks-id="6fc367ba-3203-4c62"><div class="_1xz0fezn" data-webtasks-id="406733be-01b2-4a1e">Prehistoric art</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="48adbcbb-0388-4251"><div class="_1e8pns9" data-webtasks-id="abe50088-0b64-43c1" style="color: rgb(190, 38, 18);"><a aria-label="Ancient Mediterranean + Europe" class="_1ex1wlka" href="/humanities/ancient-art-civilizations" data-webtasks-id="721bd48f-a233-4c1a"><div class="_1gyxjpg" data-webtasks-id="b2ccea14-2068-48f2"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/ancient_art_civilizations.jpg-d13bd4-128c.jpeg" class="_1qjkefo" data-webtasks-id="2f65d557-f8b2-4e61"></div><div class="_9t9e7d" data-webtasks-id="cbbbb6a4-fc87-486d"><div class="_1xz0fezn" data-webtasks-id="c75df82d-bab6-41e5">Ancient Mediterranean + Europe</div></div></a></div></li></ul></div></div></li><li class="_6b6787" data-webtasks-id="30a79e1c-64fb-4c86"><div class="_xu2jcg _14nthjb" data-webtasks-id="feedef1a-4882-4aeb"><div class="_1m1qpko" data-webtasks-id="5c75c8bb-ffca-457b"><h3 class="_q16zme" data-webtasks-id="22c0de8c-5eff-4a8a">Biology library</h3><a class="_1u32zoma" href="/science/biology" data-webtasks-id="eae519a0-0397-4907">See all (37)</a></div><div data-webtasks-id="45e75065-de01-4dd9"><ul data-webtasks-id="c929ddb3-c811-4dfe"><li class="_9yeqka" data-webtasks-id="1457caf6-1077-4f29"><div class="_1e8pns9" data-webtasks-id="a418b225-940c-4c89" style="color: rgb(158, 3, 78);"><a aria-label="Intro to biology" class="_1ex1wlka" href="/science/biology/intro-to-biology" data-webtasks-id="22bb149c-5d8f-44a6"><div class="_1gyxjpg" data-webtasks-id="ef4eee19-d535-4c76"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/classical_genetics.png-b39283-128c.png" class="_1qjkefo" data-webtasks-id="07484b68-c949-467c"></div><div class="_9t9e7d" data-webtasks-id="cefb6836-b4f0-4a84"><div class="_1xz0fezn" data-webtasks-id="45da1542-28e1-4b7f">Intro to biology</div></div></a><div class="_106eiejf" data-webtasks-id="2831b422-7bf7-4034"><div class="_xu2jcg" data-webtasks-id="6dd368bc-1e1e-4955"><div class="_2p63cnw" data-webtasks-id="cee57783-65e3-4aa3"><a data-test-id="start-right" id="uid-popover-2-wb-id-anchor" role="button" aria-controls="uid-popover-2-wb-id" aria-expanded="false" class="_1448c3ub" href="/science/biology/intro-to-biology" data-webtasks-id="5ba6e400-07fd-44cb"><span class="_90x24ln" data-webtasks-id="6f8dde38-cd39-4422">Start</span></a></div><div class="_vd38ksx" data-webtasks-id="ca5baba9-dc14-45df"><a data-test-id="start-bottom" id="uid-popover-3-wb-id-anchor" role="button" aria-controls="uid-popover-3-wb-id" aria-expanded="false" class="_1448c3ub" href="/science/biology/intro-to-biology" data-webtasks-id="6df1a064-5e09-423b"><span class="_90x24ln" data-webtasks-id="7132da60-e863-457b">Start</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="c273283b-b569-4d1c"><div class="_1e8pns9" data-webtasks-id="d6f57d55-662a-42cb" style="color: rgb(158, 3, 78);"><a aria-label="Chemistry of life" class="_1ex1wlka" href="/science/biology/chemistry--of-life" data-webtasks-id="6b088e61-b54a-4fdf"><div class="_1gyxjpg" data-webtasks-id="f7dffb29-087c-4224"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/biology.png-8fe25b-128c.png" class="_1qjkefo" data-webtasks-id="1297aa64-c2de-46b6"></div><div class="_9t9e7d" data-webtasks-id="82877b6b-123a-44a6"><div class="_1xz0fezn" data-webtasks-id="83af0aac-651c-4271">Chemistry of life</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="3b8eef38-1af5-42a5"><div class="_1e8pns9" data-webtasks-id="021e9aea-a267-40ae" style="color: rgb(158, 3, 78);"><a aria-label="Water, acids, and bases" class="_1ex1wlka" href="/science/biology/water-acids-and-bases" data-webtasks-id="27f688ae-d803-47c6"><div class="_1gyxjpg" data-webtasks-id="1ebe7477-1e8c-4c78"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/acids_bases.png-b5e1c5-128c.png" class="_1qjkefo" data-webtasks-id="3a7126ac-2543-4cd8"></div><div class="_9t9e7d" data-webtasks-id="b14af639-d0a5-4e9c"><div class="_1xz0fezn" data-webtasks-id="25ebf717-5225-4e15">Water, acids, and bases</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="703718f1-26f9-4319"><div class="_1e8pns9" data-webtasks-id="4c4fd0ba-9117-49a3" style="color: rgb(158, 3, 78);"><a aria-label="Properties of carbon" class="_1ex1wlka" href="/science/biology/properties-of-carbon" data-webtasks-id="10251ba5-be3e-4197"><div class="_1gyxjpg" data-webtasks-id="dd185cb3-1c1b-4dc1"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/properties_of_carbon.png-b461c3-128c.png" class="_1qjkefo" data-webtasks-id="35361f87-9a2b-4eec"></div><div class="_9t9e7d" data-webtasks-id="78607f02-83c8-44c0"><div class="_1xz0fezn" data-webtasks-id="4019a8e8-d6b4-4fcb">Properties of carbon</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="db59b9fd-ddf9-43fb"><div class="_1e8pns9" data-webtasks-id="e7afcc9b-85c2-46e4" style="color: rgb(158, 3, 78);"><a aria-label="Macromolecules" class="_1ex1wlka" href="/science/biology/macromolecules" data-webtasks-id="a056453f-e859-4311"><div class="_1gyxjpg" data-webtasks-id="6d13bec4-0ae6-421c"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/macromolecules.png-ca6c6c-128c.png" class="_1qjkefo" data-webtasks-id="f44b33f3-8f36-4cf2"></div><div class="_9t9e7d" data-webtasks-id="99832fd9-e0b6-4ea4"><div class="_1xz0fezn" data-webtasks-id="27fffe15-ef9f-4cc6">Macromolecules</div></div></a></div></li></ul></div></div></li><li class="_6b6787" data-webtasks-id="ffa10638-dd57-42a8"><div class="_xu2jcg _14nthjb" data-webtasks-id="94bd4e55-1b90-4db1"><div class="_1m1qpko" data-webtasks-id="6446c537-bb17-4389"><h3 class="_q16zme" data-webtasks-id="9f82d78a-2e73-4b43">Computer programming</h3><a class="_1u32zoma" href="/computing/computer-programming" data-webtasks-id="9f53f2db-6e87-43ab">See all (8)</a></div><div data-webtasks-id="440b7a3f-c82b-4eed"><ul data-webtasks-id="71b6ff5c-7f5d-4ed3"><li class="_9yeqka" data-webtasks-id="16f5f2e3-75b2-4aab"><div class="_1e8pns9" data-webtasks-id="a6143be6-2346-42e4" style="color: rgb(13, 146, 63);"><a aria-label="Intro to JS: Drawing &amp; Animation" class="_1ex1wlka" href="/computing/computer-programming/programming" data-webtasks-id="abf892b5-c742-42c7"><div class="_1gyxjpg" data-webtasks-id="cbf42e98-1423-48f3"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/programming.png-e13016-128c.png" class="_1qjkefo" data-webtasks-id="360fc186-23d4-4814"></div><div class="_9t9e7d" data-webtasks-id="c88d48d7-30ec-4a08"><div class="_1xz0fezn" data-webtasks-id="4604a258-3155-404e">Intro to JS: Drawing &amp; Animation</div></div></a><div class="_106eiejf" data-webtasks-id="bc4ebff6-86e9-4ac4"><div class="_xu2jcg" data-webtasks-id="eecdd0b8-582f-4085"><div class="_2p63cnw" data-webtasks-id="86cb3b62-bb78-42ce"><a data-test-id="start-right" id="uid-popover-4-wb-id-anchor" role="button" aria-controls="uid-popover-4-wb-id" aria-expanded="false" class="_1448c3ub" href="/computing/computer-programming/programming" data-webtasks-id="ab1a0696-f890-4d06"><span class="_90x24ln" data-webtasks-id="b4f2c7c5-c7fa-414c">Resume</span></a></div><div class="_vd38ksx" data-webtasks-id="d9b42d11-68a2-4490"><a data-test-id="start-bottom" id="uid-popover-5-wb-id-anchor" role="button" aria-controls="uid-popover-5-wb-id" aria-expanded="false" class="_1448c3ub" href="/computing/computer-programming/programming" data-webtasks-id="2edd030b-5575-494a"><span class="_90x24ln" data-webtasks-id="13f759a5-450c-4fa1">Resume</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="d3772bf2-e514-4cdc"><div class="_1e8pns9" data-webtasks-id="12ca1850-1787-4589" style="color: rgb(13, 146, 63);"><a aria-label="Intro to HTML/CSS: Making webpages" class="_1ex1wlka" href="/computing/computer-programming/html-css" data-webtasks-id="0e1fa219-6cf1-4851"><div class="_1gyxjpg" data-webtasks-id="fb640d63-54c8-4bce"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/markup.png-8a1e75-128c.png" class="_1qjkefo" data-webtasks-id="7cb819db-d907-490c"></div><div class="_9t9e7d" data-webtasks-id="0a404b40-a602-4983"><div class="_1xz0fezn" data-webtasks-id="2a7b3fed-43bf-4678">Intro to HTML/CSS: Making webpages</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="98635f00-b4b1-42d6"><div class="_1e8pns9" data-webtasks-id="34bbf904-ba35-4cd3" style="color: rgb(13, 146, 63);"><a aria-label="Intro to SQL: Querying and managing data" class="_1ex1wlka" href="/computing/computer-programming/sql" data-webtasks-id="f6c45f53-3ffb-4cd4"><div class="_1gyxjpg" data-webtasks-id="59d7cca9-0341-4ea9"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/databases.png-776f54-128c.png" class="_1qjkefo" data-webtasks-id="6b35f3e4-aa59-45d0"></div><div class="_9t9e7d" data-webtasks-id="ff76e3e8-99e9-4a70"><div class="_1xz0fezn" data-webtasks-id="c54a501e-b65f-460c">Intro to SQL: Querying and managing data</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="481cf9d3-bf11-4f8c"><div class="_1e8pns9" data-webtasks-id="aea6236f-7750-401d" style="color: rgb(13, 146, 63);"><a aria-label="Advanced JS: Games &amp; Visualizations" class="_1ex1wlka" href="/computing/computer-programming/programming-games-visualizations" data-webtasks-id="853d1bb6-2f6e-4517"><div class="_1gyxjpg" data-webtasks-id="793d136c-dff4-445b"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/simulations.png-955b92-128c.png" class="_1qjkefo" data-webtasks-id="89804516-6327-4973"></div><div class="_9t9e7d" data-webtasks-id="97f4e51d-a4e9-40bf"><div class="_1xz0fezn" data-webtasks-id="acb21fe5-b138-4146">Advanced JS: Games &amp; Visualizations</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="e124690b-15c0-4f79"><div class="_1e8pns9" data-webtasks-id="223317cf-7ced-46a3" style="color: rgb(13, 146, 63);"><a aria-label="Advanced JS: Natural Simulations" class="_1ex1wlka" href="/computing/computer-programming/programming-natural-simulations" data-webtasks-id="91ca8e20-5d0b-41cd"><div class="_1gyxjpg" data-webtasks-id="6d792d24-ad00-42fa"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/simulations.png-955b92-128c.png" class="_1qjkefo" data-webtasks-id="39e29d78-11c8-4b25"></div><div class="_9t9e7d" data-webtasks-id="8db2f360-bcbc-4c5b"><div class="_1xz0fezn" data-webtasks-id="f1f819d3-e303-4180">Advanced JS: Natural Simulations</div></div></a></div></li></ul></div></div></li><li class="_6b6787" data-webtasks-id="c64a77da-d180-4502"><div class="_xu2jcg _14nthjb" data-webtasks-id="f4c9dcb7-3705-4d62"><div class="_1m1qpko" data-webtasks-id="79858f74-8d77-4fb3"><h3 class="_q16zme" data-webtasks-id="d08d5c5c-c5ef-4265">Computer science</h3><a class="_1u32zoma" href="/computing/computer-science" data-webtasks-id="923fb4b1-b952-4a50">See all (3)</a></div><div data-webtasks-id="28f10c83-f255-423d"><ul data-webtasks-id="135cee27-57b0-42d2"><li class="_9yeqka" data-webtasks-id="c1c46178-6e47-46da"><div class="_1e8pns9" data-webtasks-id="85b63c56-dc03-49c5" style="color: rgb(13, 146, 63);"><a aria-label="Algorithms" class="_1ex1wlka" href="/computing/computer-science/algorithms" data-webtasks-id="af48eb72-3c00-4cb6"><div class="_1gyxjpg" data-webtasks-id="c803c9ed-161d-4eae"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/algorithms.png-a4492d-128c.png" class="_1qjkefo" data-webtasks-id="05a0f761-f61d-4732"></div><div class="_9t9e7d" data-webtasks-id="c5f7bf42-3920-4284"><div class="_1xz0fezn" data-webtasks-id="5a6f2157-bc8d-43af">Algorithms</div></div></a><div class="_106eiejf" data-webtasks-id="5945f524-4bab-47ff"><div class="_xu2jcg" data-webtasks-id="04d0e8d2-7664-472a"><div class="_2p63cnw" data-webtasks-id="9d29d0a3-4024-4854"><a data-test-id="start-right" id="uid-popover-6-wb-id-anchor" role="button" aria-controls="uid-popover-6-wb-id" aria-expanded="false" class="_1448c3ub" href="/computing/computer-science/algorithms" data-webtasks-id="2960be3d-0c69-4f12"><span class="_90x24ln" data-webtasks-id="c5f79317-c1a4-4f33">Resume</span></a></div><div class="_vd38ksx" data-webtasks-id="1220922a-2035-4bc4"><a data-test-id="start-bottom" id="uid-popover-7-wb-id-anchor" role="button" aria-controls="uid-popover-7-wb-id" aria-expanded="false" class="_1448c3ub" href="/computing/computer-science/algorithms" data-webtasks-id="8c8342ca-5848-46f2"><span class="_90x24ln" data-webtasks-id="26c0fb2a-c41c-4a28">Resume</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="893ab6dc-d8ec-406e"><div class="_1e8pns9" data-webtasks-id="5b704fa3-1f72-4996" style="color: rgb(13, 146, 63);"><a aria-label="Cryptography" class="_1ex1wlka" href="/computing/computer-science/cryptography" data-webtasks-id="0d808e2b-622f-434c"><div class="_1gyxjpg" data-webtasks-id="d5d50c7f-9ed0-4084"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/security.png-3de9d9-128c.png" class="_1qjkefo" data-webtasks-id="f5357668-fade-4a25"></div><div class="_9t9e7d" data-webtasks-id="ccdb4a82-3808-4ee8"><div class="_1xz0fezn" data-webtasks-id="6d347233-0869-4dce">Cryptography</div></div></a></div></li><li class="_1un4dwm9" data-webtasks-id="3197c042-b8e9-4d21"><div class="_1e8pns9" data-webtasks-id="d9f6b95e-4614-4a81" style="color: rgb(13, 146, 63);"><a aria-label="Information theory" class="_1ex1wlka" href="/computing/computer-science/informationtheory" data-webtasks-id="1e1dafb3-20fa-420b"><div class="_1gyxjpg" data-webtasks-id="f5914265-46f1-4191"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/information_theory.png-60d575-128c.png" class="_1qjkefo" data-webtasks-id="d20dc3c6-bbdd-472d"></div><div class="_9t9e7d" data-webtasks-id="9c9dc72d-42f9-4cbd"><div class="_1xz0fezn" data-webtasks-id="d1d72a1e-35ea-41c1">Information theory</div></div></a></div></li></ul></div></div></li><li class="_6b6787" data-webtasks-id="70ca6b91-8662-472d"><div class="_xu2jcg _14nthjb" data-webtasks-id="8a03bd3d-536f-493e"><div class="_1m1qpko" data-webtasks-id="ea0b7ed6-c6a2-4399"><h3 class="_q16zme" data-webtasks-id="665b8f45-4d00-4914">Cosmology and astronomy</h3><a class="_1u32zoma" href="/science/cosmology-and-astronomy" data-webtasks-id="671e91db-3c1d-453a">See all (4)</a></div><div data-webtasks-id="d3c27a06-38a9-4a25"><ul data-webtasks-id="36b79d7e-2dbb-4a6c"><li class="_9yeqka" data-webtasks-id="bc9823dc-d350-40df"><div class="_1e8pns9" data-webtasks-id="7edd564f-6e20-4f9e" style="color: rgb(158, 3, 78);"><a aria-label="Scale of the universe" class="_1ex1wlka" href="/science/cosmology-and-astronomy/universe-scale-topic" data-webtasks-id="89c69967-eb26-41f2"><div class="_1gyxjpg" data-webtasks-id="a24fec8e-9f85-4edd"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/universe_scale.png-9fa814-128c.png" class="_1qjkefo" data-webtasks-id="5dd63c8a-c521-4aa7"></div><div class="_9t9e7d" data-webtasks-id="4c979f31-8e04-4cdc"><div class="_1xz0fezn" data-webtasks-id="4d234cf1-b2b4-4308">Scale of the universe</div></div></a><div class="_106eiejf" data-webtasks-id="94ba2e63-7c49-4154"><div class="_xu2jcg" data-webtasks-id="b10028b2-d513-40f9"><div class="_2p63cnw" data-webtasks-id="12c5614a-c6e2-49d0"><a data-test-id="start-right" id="uid-popover-8-wb-id-anchor" role="button" aria-controls="uid-popover-8-wb-id" aria-expanded="false" class="_1448c3ub" href="/science/cosmology-and-astronomy/universe-scale-topic" data-webtasks-id="2618a510-230d-4071"><span class="_90x24ln" data-webtasks-id="1d6030a1-2d44-46c4">Start</span></a></div><div class="_vd38ksx" data-webtasks-id="0cb38dbf-8557-46d9"><a data-test-id="start-bottom" id="uid-popover-9-wb-id-anchor" role="button" aria-controls="uid-popover-9-wb-id" aria-expanded="false" class="_1448c3ub" href="/science/cosmology-and-astronomy/universe-scale-topic" data-webtasks-id="aca2b2a8-7926-45ea"><span class="_90x24ln" data-webtasks-id="8b24481d-f023-4dec">Start</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="a93aec83-c2d1-40ae"><div class="_1e8pns9" data-webtasks-id="1f342b1c-7a55-4d3a" style="color: rgb(158, 3, 78);"><a aria-label="Stars, black holes and galaxies" class="_1ex1wlka" href="/science/cosmology-and-astronomy/stellar-life-topic" data-webtasks-id="029ad15d-7e3f-43ea"><div class="_1gyxjpg" data-webtasks-id="8ecda894-13ac-46c6"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/stellar_life.jpg-93cb11-128c.jpeg" class="_1qjkefo" data-webtasks-id="be80af90-6bc6-46bd"></div><div class="_9t9e7d" data-webtasks-id="daf32548-f202-436f"><div class="_1xz0fezn" data-webtasks-id="bfc7a8f1-9d89-4fc5">Stars, black holes and galaxies</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="0ab13a99-7872-41b9"><div class="_1e8pns9" data-webtasks-id="c4f16257-f551-467f" style="color: rgb(158, 3, 78);"><a aria-label="Earth geological and climatic history" class="_1ex1wlka" href="/science/cosmology-and-astronomy/earth-history-topic" data-webtasks-id="cba94e49-3833-4366"><div class="_1gyxjpg" data-webtasks-id="75ff196b-e33c-41f1"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/earth_history.jpg-95f694-128c.jpeg" class="_1qjkefo" data-webtasks-id="aeb60fc9-5710-4de3"></div><div class="_9t9e7d" data-webtasks-id="ef470c7b-35ae-49c9"><div class="_1xz0fezn" data-webtasks-id="b68847f3-f2c0-4f42">Earth geological and climatic history</div></div></a></div></li><li class="_1un4dwm9" data-webtasks-id="cad8e2ad-2ca8-4694"><div class="_1e8pns9" data-webtasks-id="54a0ddec-d3c8-4508" style="color: rgb(158, 3, 78);"><a aria-label="Life on earth and in the universe" class="_1ex1wlka" href="/science/cosmology-and-astronomy/life-earth-universe" data-webtasks-id="d426cf70-d7ed-4cef"><div class="_1gyxjpg" data-webtasks-id="c07f1a69-6fcf-4a84"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/life_on_earth.jpg-30826a-128c.jpeg" class="_1qjkefo" data-webtasks-id="88bf3825-cfbc-460f"></div><div class="_9t9e7d" data-webtasks-id="74fd6965-2cbf-43eb"><div class="_1xz0fezn" data-webtasks-id="33d57484-e83b-4832">Life on earth and in the universe</div></div></a></div></li></ul></div></div></li><li class="_6b6787" data-webtasks-id="b3c4d050-3829-4ad5"><div class="_xu2jcg _14nthjb" data-webtasks-id="2cc46819-3cde-490f"><div class="_1m1qpko" data-webtasks-id="cafe44dd-af2a-4dd5"><h3 class="_q16zme" data-webtasks-id="9425538c-84b2-40b8">Electrical engineering</h3><a class="_1u32zoma" href="/science/electrical-engineering" data-webtasks-id="04fcf591-dba3-494a">See all (9)</a></div><div data-webtasks-id="c2301227-d076-4391"><ul data-webtasks-id="6bcb463b-daff-48fa"><li class="_9yeqka" data-webtasks-id="8ca36ff7-a79a-44d2"><div class="_1e8pns9" data-webtasks-id="35866d10-7fa3-4c62" style="color: rgb(158, 3, 78);"><a aria-label="Introduction to electrical engineering" class="_1ex1wlka" href="/science/electrical-engineering/introduction-to-ee" data-webtasks-id="35d02bc7-2c7f-47f7"><div class="_1gyxjpg" data-webtasks-id="d5799c3e-1178-47a4"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/electrical_engineering.png-da92ce-128c.png" class="_1qjkefo" data-webtasks-id="fead6c8f-0885-41f0"></div><div class="_9t9e7d" data-webtasks-id="3f8c1fe5-eaee-4ce5"><div class="_1xz0fezn" data-webtasks-id="75f8b41e-7bfd-4fb5">Introduction to electrical engineering</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="995bd9b3-c23a-4756"><div class="_1e8pns9" data-webtasks-id="2bd8be79-fdaa-4ff0" style="color: rgb(158, 3, 78);"><a aria-label="Circuit analysis" class="_1ex1wlka" href="/science/electrical-engineering/ee-circuit-analysis-topic" data-webtasks-id="3342a23e-4848-4484"><div class="_1gyxjpg" data-webtasks-id="187e74a0-169f-48bc"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/electrical_engineering.png-da92ce-128c.png" class="_1qjkefo" data-webtasks-id="adc25b2e-7610-4a17"></div><div class="_9t9e7d" data-webtasks-id="da5e761f-f004-4209"><div class="_1xz0fezn" data-webtasks-id="b72a5778-5051-40b7">Circuit analysis</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="89d555af-341e-46af"><div class="_1e8pns9" data-webtasks-id="1476d983-19c1-47f7" style="color: rgb(158, 3, 78);"><a aria-label="Amplifiers" class="_1ex1wlka" href="/science/electrical-engineering/ee-amplifiers" data-webtasks-id="893f18ad-83d5-4329"><div class="_1gyxjpg" data-webtasks-id="c89b7c27-55e8-47d1"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/electrical_engineering.png-da92ce-128c.png" class="_1qjkefo" data-webtasks-id="1dff4ea8-9066-4925"></div><div class="_9t9e7d" data-webtasks-id="e6d4f08d-08ba-4378"><div class="_1xz0fezn" data-webtasks-id="185110f9-ad0c-4d74">Amplifiers</div></div></a><div class="_106eiejf" data-webtasks-id="012cec5d-d583-4993"><div class="_xu2jcg" data-webtasks-id="40e510d9-2c9b-4162"><div class="_2p63cnw" data-webtasks-id="a6ca315d-09b5-42bf"><a data-test-id="start-right" id="uid-popover-10-wb-id-anchor" role="button" aria-controls="uid-popover-10-wb-id" aria-expanded="false" class="_1448c3ub" href="/science/electrical-engineering/ee-amplifiers" data-webtasks-id="1ef11ce3-9551-4c42"><span class="_90x24ln" data-webtasks-id="f08f6629-ff25-4be2">Resume</span></a></div><div class="_vd38ksx" data-webtasks-id="549579bb-db94-4d79"><a data-test-id="start-bottom" id="uid-popover-11-wb-id-anchor" role="button" aria-controls="uid-popover-11-wb-id" aria-expanded="false" class="_1448c3ub" href="/science/electrical-engineering/ee-amplifiers" data-webtasks-id="b07c3dd2-3524-4aaa"><span class="_90x24ln" data-webtasks-id="f7e06975-08f0-4041">Resume</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="28991bbc-b90d-4e50"><div class="_1e8pns9" data-webtasks-id="0d6582f9-fe19-4292" style="color: rgb(158, 3, 78);"><a aria-label="Semiconductor devices" class="_1ex1wlka" href="/science/electrical-engineering/ee-semiconductor-devices" data-webtasks-id="234942e3-0b2c-4efe"><div class="_1gyxjpg" data-webtasks-id="cd47e4b7-589b-4438"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/electrical_engineering.png-da92ce-128c.png" class="_1qjkefo" data-webtasks-id="e07b55a8-d807-4c12"></div><div class="_9t9e7d" data-webtasks-id="3a6e5abe-81d9-4123"><div class="_1xz0fezn" data-webtasks-id="e1090bfa-3e81-43d8">Semiconductor devices</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="6a787baa-9f3b-4e7e"><div class="_1e8pns9" data-webtasks-id="eeb2c21e-7a7f-45cc" style="color: rgb(158, 3, 78);"><a aria-label="Electrostatics" class="_1ex1wlka" href="/science/electrical-engineering/ee-electrostatics" 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data-webtasks-id="8e2deda2-25ff-468c"><div class="_1e8pns9" data-webtasks-id="b30fdffc-a6e7-4b0f" style="color: rgb(167, 90, 5);"><a aria-label="Basic economics concepts" class="_1ex1wlka" href="/economics-finance-domain/macroeconomics/macro-basic-economics-concepts" data-webtasks-id="9d7d63de-08e8-4c52"><div class="_1gyxjpg" data-webtasks-id="903753ea-f393-4137"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/macroeconomics.png-d28a4e-128c.png" class="_1qjkefo" data-webtasks-id="61ef1b3c-bd4f-436e"></div><div class="_9t9e7d" data-webtasks-id="08a95e24-0a3a-4d0c"><div class="_1xz0fezn" data-webtasks-id="d69d66bb-14ee-4387">Basic economics concepts</div></div></a><div class="_106eiejf" data-webtasks-id="0915ffe2-e17f-44ed"><div class="_xu2jcg" data-webtasks-id="78d8bad6-e53e-47e0"><div class="_2p63cnw" data-webtasks-id="cdbcd9cf-55c1-4259"><a data-test-id="start-right" id="uid-popover-12-wb-id-anchor" role="button" aria-controls="uid-popover-12-wb-id" aria-expanded="false" class="_1448c3ub" href="/economics-finance-domain/macroeconomics/macro-basic-economics-concepts" data-webtasks-id="03e2b483-a1fa-4a75"><span class="_90x24ln" data-webtasks-id="368086cf-f9e1-46e4">Start</span></a></div><div class="_vd38ksx" data-webtasks-id="eeaa5b8e-5bbc-4e1c"><a data-test-id="start-bottom" id="uid-popover-13-wb-id-anchor" role="button" aria-controls="uid-popover-13-wb-id" aria-expanded="false" class="_1448c3ub" href="/economics-finance-domain/macroeconomics/macro-basic-economics-concepts" data-webtasks-id="9bfc196a-35f7-4f7d"><span class="_90x24ln" data-webtasks-id="7d6f3745-963f-4821">Start</span></a></div></div></div></div></li><li class="_5uxlpg" data-webtasks-id="e60aca6b-82a8-41f1"><div class="_1e8pns9" data-webtasks-id="bff400c8-8b8c-49ac" style="color: rgb(167, 90, 5);"><a aria-label="Economic indicators and the business cycle" class="_1ex1wlka" href="/economics-finance-domain/macroeconomics/macro-economic-indicators-and-the-business-cycle" data-webtasks-id="fa11d4f5-1fa2-4dff"><div class="_1gyxjpg" data-webtasks-id="10576313-2054-4633"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/macroeconomics.png-d28a4e-128c.png" class="_1qjkefo" data-webtasks-id="96765796-d886-41d1"></div><div class="_9t9e7d" data-webtasks-id="f261eddf-b836-486b"><div class="_1xz0fezn" data-webtasks-id="3b204da6-d4ad-49a5">Economic indicators and the business cycle</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="6ffb89ee-aa4a-4985"><div class="_1e8pns9" data-webtasks-id="5f1e74cb-8d03-4a24" style="color: rgb(167, 90, 5);"><a aria-label="National income and price determination" class="_1ex1wlka" href="/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic" data-webtasks-id="05061f13-c187-4a02"><div class="_1gyxjpg" data-webtasks-id="6a15ab56-0bb9-479e"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/aggregate_demand_supply.png-d218ed-128c.png" class="_1qjkefo" data-webtasks-id="3baaa386-f795-4b3b"></div><div class="_9t9e7d" data-webtasks-id="5637f653-43d8-4eca"><div class="_1xz0fezn" data-webtasks-id="7f39030d-ba07-4b2f">National income and price determination</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="b8909563-e31c-4d6f"><div class="_1e8pns9" data-webtasks-id="b8e633b0-5801-4ba3" style="color: rgb(167, 90, 5);"><a aria-label="Financial sector" class="_1ex1wlka" href="/economics-finance-domain/macroeconomics/monetary-system-topic" data-webtasks-id="3505959d-a207-48e6"><div class="_1gyxjpg" data-webtasks-id="fe7c5663-aef2-44b8"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/monetary_system.png-516782-128c.png" class="_1qjkefo" data-webtasks-id="e420b320-7c16-4acd"></div><div class="_9t9e7d" data-webtasks-id="7359a0f7-badb-46e6"><div class="_1xz0fezn" data-webtasks-id="aa7fc0b3-9991-4f82">Financial sector</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="32676427-1eb6-4c68"><div class="_1e8pns9" data-webtasks-id="1f98c618-3ef9-41c0" style="color: rgb(167, 90, 5);"><a aria-label="Long-run consequences of stabilization policies" class="_1ex1wlka" href="/economics-finance-domain/macroeconomics/macro-long-run-consequences-of-stabilization-policies" data-webtasks-id="e9b0d2f5-1a50-47ba"><div class="_1gyxjpg" data-webtasks-id="707e3338-069d-4376"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/macroeconomics.png-d28a4e-128c.png" class="_1qjkefo" data-webtasks-id="7b29f2de-58ec-4b8e"></div><div class="_9t9e7d" data-webtasks-id="5f2485d4-94ba-4976"><div class="_1xz0fezn" data-webtasks-id="3ccc2b9d-72ec-4392">Long-run consequences of stabilization policies</div></div></a></div></li></ul></div></div></li><li class="_6b6787" data-webtasks-id="268949fb-267e-4977"><div class="_xu2jcg _14nthjb" data-webtasks-id="24bafd62-68b3-4a0a"><div class="_1m1qpko" data-webtasks-id="33f4f81a-f617-4787"><h3 class="_q16zme" data-webtasks-id="a628fbfb-8aa2-47b2">World history</h3><a class="_1u32zoma" href="/humanities/world-history" data-webtasks-id="7a493564-4b5e-40ab">See all (6)</a></div><div data-webtasks-id="f03e1fc2-f053-4654"><ul data-webtasks-id="94e43a1a-6b76-480a"><li class="_5uxlpg" data-webtasks-id="59f58cc9-ec7f-4efd"><div class="_1e8pns9" data-webtasks-id="99fb196c-479e-417f" style="color: rgb(190, 38, 18);"><a aria-label="600 BCE - 600 CE Second-Wave Civilizations" class="_1ex1wlka" href="/humanities/world-history/ancient-medieval" data-webtasks-id="f07b544d-dc74-4d12"><div class="_1gyxjpg" data-webtasks-id="0da0d6ee-9058-4c60"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/ancient_medieval.jpg-496ef8-128c.jpeg" class="_1qjkefo" data-webtasks-id="2064b0ee-b63a-4c36"></div><div class="_9t9e7d" data-webtasks-id="e601d135-a772-4426"><div class="_1xz0fezn" data-webtasks-id="5d7c3c3c-d1b5-4c27">600 BCE - 600 CE Second-Wave Civilizations</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="c09dd0b0-f767-4670"><div class="_1e8pns9" data-webtasks-id="c74904a0-a1ba-4b90" style="color: rgb(190, 38, 18);"><a aria-label="600 - 1450 Regional and interregional interactions " class="_1ex1wlka" href="/humanities/world-history/medieval-times" data-webtasks-id="fdef2bac-229f-48d8"><div class="_1gyxjpg" data-webtasks-id="2163b01b-236b-4c8d"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/medieval_book.jpg-619ad6-128c.jpeg" class="_1qjkefo" data-webtasks-id="68978d06-0471-4156"></div><div class="_9t9e7d" data-webtasks-id="3c327ea6-4688-4def"><div class="_1xz0fezn" data-webtasks-id="84c9c840-7a43-4991">600 - 1450 Regional and interregional interactions </div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="4e60dda4-a3d9-4dd8"><div class="_1e8pns9" data-webtasks-id="ec42a945-c23c-447d" style="color: rgb(190, 38, 18);"><a aria-label="1450 - 1750 Renaissance and Reformation" class="_1ex1wlka" href="/humanities/world-history/renaissance-and-reformation" data-webtasks-id="4ca09e4f-fe3e-454a"><div class="_1gyxjpg" data-webtasks-id="b6faaf53-b31f-40dc"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/high_ren_florence_rome.jpg-455d88-128c.jpeg" class="_1qjkefo" data-webtasks-id="6eaf4149-cac6-4bd9"></div><div class="_9t9e7d" data-webtasks-id="0c46a94e-853a-40bc"><div class="_1xz0fezn" data-webtasks-id="08985c8f-1d6b-45a7">1450 - 1750 Renaissance and Reformation</div></div></a></div></li><li class="_5uxlpg" data-webtasks-id="cdc58371-b6ad-49c3"><div class="_1e8pns9" data-webtasks-id="84219e2d-be99-4f34" style="color: rgb(190, 38, 18);"><a aria-label="1750 -1900 Enlightenment and Revolution" class="_1ex1wlka" href="/humanities/world-history/1600s-1800s" data-webtasks-id="fafb8971-251b-43be"><div class="_1gyxjpg" data-webtasks-id="85110c4f-d055-447d"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/s1700_1900.jpg-4ba21b-128c.jpeg" class="_1qjkefo" data-webtasks-id="b037bc4c-0199-4ec3"></div><div class="_9t9e7d" data-webtasks-id="b64ae730-836d-4f0c"><div class="_1xz0fezn" data-webtasks-id="8e7eb9d3-37cb-4502">1750 -1900 Enlightenment and Revolution</div></div></a></div></li><li class="_1un4dwm9" data-webtasks-id="b0dbbaeb-cbae-42b0"><div class="_1e8pns9" data-webtasks-id="5b0bc21e-7878-445b" style="color: rgb(190, 38, 18);"><a aria-label="The 20th century " class="_1ex1wlka" href="/humanities/world-history/euro-hist" data-webtasks-id="8c09781c-a63d-43c9"><div class="_1gyxjpg" data-webtasks-id="a2e332fb-be7d-4047"><img alt="" aria-hidden="true" src="https://cdn.kastatic.org/genfiles/topic-icons/icons/s1900_present.jpg-1b9a5e-128c.jpeg" class="_1qjkefo" data-webtasks-id="082c533d-2b97-4b0f"></div><div class="_9t9e7d" data-webtasks-id="6f541009-c01d-4616"><div class="_1xz0fezn" data-webtasks-id="95dcfa8f-712e-43ec">The 20th century </div></div></a><div class="_106eiejf" data-webtasks-id="1c73c6fd-1df7-4e27"><div class="_xu2jcg" data-webtasks-id="715c0798-ddd2-44d6"><div class="_2p63cnw" data-webtasks-id="63c6772f-b023-49d0"><a data-test-id="start-right" id="uid-popover-14-wb-id-anchor" role="button" aria-controls="uid-popover-14-wb-id" aria-expanded="false" class="_1448c3ub" href="/humanities/world-history/euro-hist" data-webtasks-id="4eeb4609-a19c-41b4"><span class="_90x24ln" data-webtasks-id="2f1bfb34-29b7-4c11">Resume</span></a></div><div class="_vd38ksx" data-webtasks-id="4aa2574e-8e16-4300"><a data-test-id="start-bottom" id="uid-popover-15-wb-id-anchor" role="button" aria-controls="uid-popover-15-wb-id" aria-expanded="false" class="_1448c3ub" href="/humanities/world-history/euro-hist" data-webtasks-id="e327fa72-48ae-4335"><span 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