![TIL the Inka never developed writing but instead had a system of tying knots called khipu in which the color, direction and structure of the knots communicated different information. While most of TIL the Inka never developed writing but instead had a system of tying knots called khipu in which the color, direction and structure of the knots communicated different information. While most of](https://external-preview.redd.it/vfsOYe3Dd6MXlo10AfeHhcI3rClkcPO1QKun-kiV6Ro.jpg?width=640&crop=smart&auto=webp&s=99e21030c6d97224eec4f6231d3da985dfdd9fe0)
TIL the Inka never developed writing but instead had a system of tying knots called khipu in which the color, direction and structure of the knots communicated different information. While most of
![Inca Science, Innovation & Technology Activity - HISTORY'S HISTORIES You are history. We are the future. Inca Science, Innovation & Technology Activity - HISTORY'S HISTORIES You are history. We are the future.](http://www.historyshistories.com/uploads/5/5/3/8/55383793/quipu4_orig.jpg)
Inca Science, Innovation & Technology Activity - HISTORY'S HISTORIES You are history. We are the future.
![Inca Science, Innovation & Technology Activity - HISTORY'S HISTORIES You are history. We are the future. Inca Science, Innovation & Technology Activity - HISTORY'S HISTORIES You are history. We are the future.](http://www.historyshistories.com/uploads/5/5/3/8/55383793/published/238642653.jpg?1501204040)