Well, there is sign language, so I guess you're right. It would be interesting to see how high bandwidth gesturing can be compared to speaking. I thought about

Well, there is sign language, so I guess you're right. It would be interesting to see how high bandwidth gesturing can be compared to speaking. I thought about this some more and I think the prevalence of making sounds rather than gesturing etc. is due to sound being a broadcasting mechanism that works over long distances and without line of sight. Visually indicating that you've claimed some territory is pretty hard.