Metallica's new album, '72 Seasons,' has met critical acclaim. What's their secret?

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More than 40 years after they formed, the music of Metallica is still resonating with new audiences.

Just last year, their 1986 track "Master of Puppets" entered the Billboard charts for the first time in its history after appearing on Stranger Things.

Months later, a string cover of their song "Nothing Else Matters" appeared on The Addams Family spin-off series Wednesday, popular among younger viewers and the TikTok crowd.

But on their new record 72 Seasons, Metallica proves they're still making inspired music for hardcore fans. For a metal band with many of its members approaching 60, that's no small feat.

NPR's Ailsa Chang spoke with drummer Lars Ulrich and bassist Robert Trujillo about what keeps that creative spark lit after all these years.