Find Me On FaceBook!









RSS: BLOG FEED

Subscribe to
Posts [Atom]



December 2006July 2007August 2007September 2007January 2008February 2008March 2008April 2008May 2008June 2008July 2008August 2008September 2008October 2008November 2008December 2008January 2009February 2009March 2009April 2009May 2009June 2009July 2009August 2009September 2009October 2009November 2009December 2009January 2010February 2010March 2010April 2010May 2010June 2010August 2010September 2010October 2010November 2010December 2010January 2011February 2011March 2011April 2011May 2011July 2011September 2011October 2011November 2011December 2011July 2012August 2012December 2012January 2013February 2013March 2013April 2013May 2013June 2013July 2013August 2013September 2013October 2013November 2013December 2013January 2014February 2014March 2014April 2014May 2014June 2014July 2014August 2014September 2014October 2014November 2014December 2014January 2015February 2015March 2015April 2015May 2015June 2015July 2015August 2015September 2015October 2015November 2015December 2015January 2016February 2016March 2016April 2016May 2016June 2016August 2016September 2016October 2016November 2016December 2016January 2017February 2017March 2017April 2017May 2017July 2017September 2017October 2017December 2017

Welcome to History Buff, a blog for history lovers everywhere! History Buff brings news stories about archaeology from around the world together on one site. From finds in ancient Egypt to new discoveries in anthropology, History Buff wants to know. And feel free to stop by History Buff's ** Author Interviews** for Q&As with authors of historical fiction. Enjoy!

Michelle Moran
Historical fiction author

As an historical fiction writer I am fascinated by news stories featuring the past as it's unearthed and reimagined and brought to life. I spend a
large quantity of time searching for news in archaeology and history. Once in a great while a new archaeological discovery will act as an inspiration for what I'm currently writing. But most of the time the news stories I read are simply interesting tidbits of history. Unfortunately, I have disallowed comments because I travel so frequently that I can neither monitor nor respond to them. But I would still love to share the history that I find fascinating each day. So welcome! And feel free to visit my website at www.michellemoran.com.

Logo designed by Shaun Venish

Blog designed by Mia Pearlman Design

4.07.2008

Aztec Math Used Hearts and Arrows

By David Biello

Oztoticpac-Lands-Map

AZTEC MATH: The Aztec used symbols such as arrows and hearts to denote fractional units of measurement in surveying records like the Oztoticpac Lands Map pictured here.
COURTESY OF LIBRARY OF CONGRESS

The Aztecs had more numbers than we do, or at least symbols denoting numerical concepts. When it came to measuring land—critical for levying the proper tax or tribute—these medieval Mesoamericans used arrows, hearts, hands and other units representing fractions, according to a new study in Science.

To figure this out, mathematician Maria del Carmen Jorge y Jorge of the National Autonomous University of Mexico (U.N.A.M) channeled the mind of an Aztec land surveyor. That meant retraining herself to use a different numerical system and combing through the Codex Vergara, one of two remaining books that record Aztec land surveying.

Working with geographer Barbara Williams and del Carmen Jorge y Jorge counted 367 fields in this book with both an overall area for the plot of land as well as the lengths of the sides. Roughly 60 percent of these fields had areas that matched the basic mathematical rule of length multiplied by width or other common surveying calculations.

But the rest were off, usually by a small amount. And 69 had areas that were prime numbers such as 211—numbers that cannot be created by multiplying two whole numbers together, such as 20 times 10. Instead, del Carmen Jorge y Jorge determined that the Aztecs were using the equivalent of fractions.

Read the rest on Scientific American.