This is about lead singer Layne Staley's battle to overcome his heroin addiction. The band became inactive 2 years later when his drug problems became too troublesome. Staley died of a drug overdose in 2002.
Jar of Flies was the first EP (extended play, like an LP except shorter) to ever top the Billboard charts. It debuted at #1.
Alice in Chains was the third band from the Seattle grunge scene to top the charts. Pearl Jam and Nirvana were the others.
This was not released as a single, but got a lot of airplay before the EP was released.
The title of the EP was taken from a high school science project done by guitarist Jerry Cantrell.
