I was watching an interview with Ian Astbury lead vocalist for the band The Cult, and Astbury stated that the album Bleach by Nirvana was the first major album that signaled something new and different was at hand, concerning the grunge era and the popularity and sound of all prior rock music of the 80s and 90s (at the time of its release). So the album Bleach seems very significant (to me) as being the first popular album to bring grunge music to the mainstream.
That is my conclusion and opinion, to the statistical significance of the album anyway.
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