The tritone has been blamed for chaos, banned by choirs, and embraced by metalheads. Here’s what the 'devil's interval' really does to your brain.

Ozzy Osbourne, the pioneering heavy metal singer who rose to prominence in the early ‘70s with Black Sabbath before establishing a successful solo career and playing himself on reality TV, died Tuesday. He was 76.

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But no one was more surprised at the success of what became Black Sabbath than Ozzy himself. Ozzy, who died this week at the age of 76, once said the thing he was most proud of was that his band was not the creation of some music mogul.

KISS frontman Gene Simmons pays tribute to Ozzy Osbourne on "CBS Mornings," calling the Black Sabbath legend a "pure human being."

Before he was a pioneering reality television star, he was a pioneering heavy metal singer. But Ozzy Osbourne’s music has always felt bigger than his celebrity.

Fans have gathered in Ozzy Osbourne’s hometown to pay tribute to the former Black Sabbath singer, who died yesterday at the age of 76. One of them told CNN’s Salma Abdelaziz that Osbourne will “live on forever in his music.