For centuries, the mighty Incan empire has confounded researchers.
The Incas controlled territory up and down the spine of South America, with a sophisticated system of tributes and distribution that kept millions fed through the seasons. They built irrigation systems and stone temples in the clouds.
And yet they had no writing. For scholars, this has been like trying to imagine how the Romans could have administered their vast empire without written Latin.
Now, after more than a decade of fieldwork and research, a professor at Harvard University believes he has uncovered a language of binary code recorded in knotted strings -- a writing system unlike virtually any other.
The strings are found on "khipus," ancient Incan objects that look something like mops. About 600 khipus (also spelled "quipu") survive in museums and private collections, and archeologists have long known that the elaborately knotted strings of some khipus recorded numbers like an abacus. Harvard's Gary Urton said the khipus contain a wealth of overlooked information hidden in their construction details, like the way the knots are tied -- and that these could be the building blocks of a lost writing system which records the history, myths, and poetry of the Incas.
The theory has Incan scholars abuzz. The discovery of true Incan writing would revolutionize their field the same way that deciphering the Egyptian hieroglyphics or Mayan glyphs lifted a veil from those civilizations. But it also has broader interest because the khipus could constitute what is, to Western eyes, a very unorthodox writing system, using knots and strings in three dimensions instead of markings on a flat expanse of paper, clay, or stone.
"What makes this work so interesting is that what is being expressed is being conceptualized in such a different way than we conceptualize," said Sabine MacCormack, a historian of the Romans and the Incas who is a professor at the University of Notre Dame. "This is about an expression of the human mind, the likes of which we don't have elsewhere."
The only way to prove Urton's theory correct would be to translate the khipus, which no one has yet done. In his new book, he proposes a new method for transcribing the knotted strings which he believes could lead to breakthroughs. And his work, funded in part by a genius grant from the MacArthur Foundation, has helped fuel a resurgence of scholarly interest in khipus. Later this month, the Chilean Museum of Pre-Columbian Art in Santiago is opening the world's first exhibit dedicated to the khipu.
"We are on the cusp of a very hot period," said Frank Salomon, a professor of anthropology at the University of Wisconsin who has studied khipus extensively.
The khipu mystery dates to the early 16th century, when the Incas were conquered by Francisco Pizarro and the Spanish set about destroying their culture. The missionaries sent to South America tried to eliminate all touches of the old gods, including the strange stringed textiles that the Incas said held their histories.
The Spanish chroniclers often exaggerated, but they did record histories of tributes and other stories they said were "read" to them by khipukamayuq -- or knot keepers -- from strings of knots.
In 1923, researcher L. Leland Locke was able to show that many khipus recorded numbers like an abacus, with knots in positions representing the hundred's, ten's, or one's place. He concluded that khipus were an accounting tool and scholars largely lost interest.
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