Jon Wiederhorn

On Jan. 17, 2001, bassist Jason Newsted revealed the news that he was exiting Metallica.

Sophomore slump? Never heard of it. In fact, System of a Down's 'Toxicity' put them on the musical map reaching new followers everywhere.

The Black Sabbath legend recruited a number of guest singers on this solo record.

On Sept. 24, 1990, Megadeth issued their 'Rust in Peace' album.

On July 21, 1971, Black Sabbath released their 'Master of Reality' album.

This was the album in which two of Iron Maiden's key players, Bruce Dickinson and Adrian Smith, returned to the lineup.

The first album after Ronnie James Dio was kicked out of Black Sabbath.

Take a look back at the landmark disc here.

This one paved the way for thrash and made Motorhead a band to contend with.

On Dec. 3, 2015, the iconic Stone Temple Pilots singer died while on tour.