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Along with volcanic ash, his brain and spinal cord were found to contain a mysterious archeological treasure: tiny, gleaming shards of black glass.

None of these substances were found outside the skull, in the volcanic ash in which the carbonized, skeletal remains were buried.

But he has a keen interest in ancient skeletons as well, and last summer examined skeletal remains from Pompeii, the ancient Roman city more famously buried and preserved under volcanic ash, like Herculaneum, when Vesuvius erupted.

Hundreds of carbonised scrolls were discovered in Herculaneum, which like its neighbour Pompeii was buried beneath metres of volcanic ash.

Australia’s Bureau of Meteorology has also warned that the volcanic ash might drift to parts of the country's north on Wednesday.