>Yet, it seems that until a couple of years ago there was no proof that any person had ever broken glass with his or her voice alone. Then in 2005 the Discovery Channel television show MythBusters ...*
Considering that we have had witnesses reporting that tons of times in the last 200 years, and written records of such acts (by journalists), and everything, this is a peculiar version of "proof".
> Yet, it seems that until a couple of years ago there was no proof that any person had ever broken glass with his or her voice alone.
> Then in 2005 the Discovery Channel television show MythBusters tackled the question [...]