Native American Sign Language

Here is a link to my brother's research on sign language: http://www.hamilton.edu/news/story/fox-tree-gives-two-papers-at-linguistics-conference-in-boston



One major piece of knowledge is that the world has more than one sign language, another is that sign language that originated in the Americas (pre ASL) is older than folks think, and those original sign languages don't have words for colors, not even black and white.