It would have more to do with accents, body odor, physical moisture and topography. Also I assume if everyone was blind than genetically we'd have developed some kind of sonar or heat visualization. Also, no buildings or complex language or math systems, because information wouldn't be transferable or easily duplicated over space and time.
If you watch the video on mute it looks like she just smelled her own fart for the first time.........
So happy for these people! How is it that they understand so easily? Are they still mostly lip-reading?
