Legend of the Crystal Brain

Digs & Discoveries July/August 2025

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Cast of Vesuvius eruption victim

When most people envision the victims of the eruption of Mount Vesuvius in a.d. 79 that destroyed the cities of Pompeii and Herculaneum, they think of the casts of their bodies made by pouring plaster into voids left by their decaying corpses. Yet not all the physical remains of those who perished in the cataclysm decayed. In one case, a remarkable transformation occurred—a man’s brain turned to glass. 

Human tissue is composed largely of water. Th

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