Time certainly flies by and a lot of rock albums are celebrating their 20th anniversaries this year.

Among them are Disturbed’s ‘Believe,’ Killswitch Engage’s ‘Alive or Just Breathing,’ and Korn’s ‘Untouchables.’

Also turning the big 2-0 this year are System of a Down’s ‘Steal This Album,’ Stone Sour’s self-titled debut, and Mastodon’s ‘Remission.’

Check out the whole list of albums turning 20 this year over at MetalInjection.net!