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      <title>Timeline of Mathematical Cultures by Amie Loudermilk</title>
      <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9</link>
      <description>Made with big dreams of obtaining a masters degree.</description>
      <language>en-us</language>
      <pubDate>2021-04-28 20:20:36 UTC</pubDate>
      <lastBuildDate>2025-12-28 19:35:02 UTC</lastBuildDate>
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         <title>Mayans- Pre 250 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1470999983</link>
         <description><![CDATA[<div>Mayans at this time were using a base 20 numerical system. </div>]]></description>
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         <pubDate>2021-04-28 20:22:58 UTC</pubDate>
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         <title>Mayans- 250 AD to 900 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471001740</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-04-28 20:23:34 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471001740</guid>
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         <title>Mayans- 900 AD to 1500 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471002854</link>
         <description><![CDATA[<div>The Dresden Codex was written between 1000 AD and 1100 AD. The codex describes Mayan mathematics and astronomy.</div>]]></description>
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         <pubDate>2021-04-28 20:23:57 UTC</pubDate>
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         <title>Africa- Ishango Bone- 20,000 BCE</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471007964</link>
         <description><![CDATA[<div>The first object found depicting what could be mathematics. It has slash marks that obviously represent logical thinking.</div>]]></description>
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         <pubDate>2021-04-28 20:25:35 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471007964</guid>
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         <title>Inca- 1400 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471025303</link>
         <description><![CDATA[<div>The Incans used Quipi to record numerical information. The Quipi is a series of knots and numbers and there positions would tell about numbers and dates.</div>]]></description>
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         <pubDate>2021-04-28 20:30:29 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471025303</guid>
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         <title>Egypt- Rhind Papyrus 1550 BC</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471048006</link>
         <description><![CDATA[<div>The Rhind Papyrus was discovered in Egypt and gives details about arithmetic, basic algebra, and solving for volume.</div>]]></description>
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         <pubDate>2021-04-28 20:37:52 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471048006</guid>
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         <title>Greece- Pythagoras 500 BC</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471549526</link>
         <description><![CDATA[<div>Pythagoras proved what we now know as the Pythagorean Theorem. </div>]]></description>
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         <pubDate>2021-04-29 00:27:56 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471549526</guid>
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         <title>China- Strips of Bamboo 300 BC</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471555568</link>
         <description><![CDATA[<div>A multiplication table was made in China of 21 strips of bamboo.</div>]]></description>
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         <pubDate>2021-04-29 00:30:17 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471555568</guid>
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         <title>Greece- Euclid 300 BC</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471559872</link>
         <description><![CDATA[<div>Euclid wrote the book <em>Elements </em>which became the main textbook used to teach geometry&nbsp;until the early 20th century, earning him the title "Father of Geometry".</div>]]></description>
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         <pubDate>2021-04-29 00:31:54 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471559872</guid>
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         <title>China- Zu Chongzhi 450 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471581950</link>
         <description><![CDATA[<div>A Chinese astronomer and mathematician, Zu correctly calculated pi to the 7th decimal by build a 24,576 sided polygon. He also discovered the formula for the volume of a sphere.</div>]]></description>
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         <pubDate>2021-04-29 00:40:13 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471581950</guid>
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         <title>Cambodia- Khmer Zero 683 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471588331</link>
         <description><![CDATA[<div>The oldest known use of the numeral zero!</div>]]></description>
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         <pubDate>2021-04-29 00:42:36 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471588331</guid>
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         <title>Italy- Fibonacci 1202 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471594078</link>
         <description><![CDATA[<div>Fibonacci published his Book of Calculation which included use of Arabic numerals instead of Roman numerals and the Fibonacci Sequence.</div>]]></description>
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         <pubDate>2021-04-29 00:44:32 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471594078</guid>
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         <title>Minoans- Bisecting Angles 1900 BC</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471617519</link>
         <description><![CDATA[<div>Centuries ahead of Euclid, signs of using a compass and straightedge to bisect angles is found in Knossos Palace.</div>]]></description>
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         <pubDate>2021-04-29 00:52:57 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471617519</guid>
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         <title>Etruscans- Platonic Solids (Vague date of &quot;before 500 BC&quot;)</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471627485</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-04-29 00:56:21 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471627485</guid>
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         <title>Thailand- The Art of Logic 1593 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471630341</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-04-29 00:57:21 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471630341</guid>
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         <title>Britain- Boolean Algebra 1847 AD</title>
         <author>aloudermilk</author>
         <link>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471635319</link>
         <description><![CDATA[<div>Boolean algebra is devised by George Boole. Boolean algebra is key in the makings of electronics and digital formulas.</div>]]></description>
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         <pubDate>2021-04-29 00:59:08 UTC</pubDate>
         <guid>https://padlet.com/aloudermilk/8jpw514qonrv9ya9/wish/1471635319</guid>
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