Easily the biggest metal band in the world, they're an unstoppable juggernaut about which almost everything has been said. To some metalheads they're the apex of what a metal act can and should be, to others they're overrated sell-outs that stopped being good after 1989.
But, whether you love or hate them, one thing remains: you're still talking about them. Such is the genius of Metallica!
But, after more than 35 years of existence, you don't become and remain constantly relevant out of blind, dumb luck. The quartet of James Hetfield, Lard Ulrich, Kirk Hammett and Robert Trujillo are undoubtedly intelligent and incredibly skilled men, as they display constantly in their music: not just in how pioneering it is, but also in the little references, titbits and call-backs that they continue love to pepper into their songs.
Hence, in celebration of these little details that a great many fans overlook, this list is going to dig deep and discover those tiny moments that, perhaps unknowingly to many, make Metallica's music even better than what you already thought.
These are just 10 small musical cues, facts and otherwise that might have made their way beneath the noses of Metallica's enormous fanbase: