He may have been small in physical stature, but there may have been no bigger giant in metal history than the late great Ronnie James Dio. Yes, he fronted Elf, Rainbow, Black Sabbath and Dio, but how well do you really know the man and his career?

For instance, do you know who inspired Ronnie's familiar devil horns sign? Have you ever heard Ronnie's pre-metal doo-wop group? What well-known guitar slinger briefly preceded Vivian Campbell in Dio's self-titled band? And what exactly is a holy diver anyway? Get the answers to those questions and more in the latest edition of 'You Think You Know Metal.'

Just click on the video above to dig into Ronnie James Dio's history and watch previous editions of the 'You Think You Know Metal' Web series below.

Script by Ed Rivadavia and Chad Childers; Narration by Full Metal Jackie; Video Editing by Paul Brasil.

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