Professor Snorri Sturloson is an Icelandic Volcanologist and friend of Nimrod. He is described as a wiry-looking man, and wears a Harlequin's black mask. This is because the professor was monitoring seismic activity with his wife, Björk , when he was hit by the pyroclastic flow and got horribly burnt on one side of his face. His assistant was Axel Heimskringla, who was killed by a Mongolian death worm in The Grave Robbers of Genghis Khan .

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