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American Focus > Blog > Tech and Science > Mount Vesuvius turned this ancient brain into glass. Here’s how
Tech and Science

Mount Vesuvius turned this ancient brain into glass. Here’s how

Last updated: February 28, 2025 4:52 am
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Mount Vesuvius turned this ancient brain into glass. Here’s how
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The eruption of Mount Vesuvius in A.D. 79 is a well-known event that resulted in the entombment of the Roman cities of Pompeii and Herculaneum. While Pompeii is more commonly associated with this disaster, Herculaneum also holds its own intriguing discoveries. One such find is the preserved skeleton of a young man found lying in bed, with surprising remnants of glass inside his brain.

Upon closer inspection of the glassy samples, researchers identified what appeared to be nerve cells. A recent study sheds more light on the formation of this glass within the brain tissue, providing insights into the intriguing phenomenon. The findings of this study were published in Scientific Reports on February 27.

Glass is typically formed when a liquid, often molten sand, cools rapidly. This natural process is commonly used in manufacturing windows and glassware. However, the discovery of glassy remnants within biological soft tissues, such as the brain, is a unique occurrence. Prior to this discovery, such glassy formations had not been observed in nature.

Guido Giordano, a geologist and volcanologist at Roma Tre University, expressed astonishment at the discovery of the glassy brain remnants. The research team utilized a technique called differential scanning calorimetry to determine the temperature at which the glass had formed. The analysis revealed that the glassy brain shards underwent structural changes at temperatures exceeding 510°C (950°F), indicating the temperature at which the brain tissue was originally transformed into glass.

The researchers concluded that the swift arrival of a hot volcanic ash cloud, rock, and gas that engulfed Herculaneum could not have been solely responsible for the formation of glass within the brain tissue. The intense heat of pyroclastic flows, which typically reach temperatures of 465°C, would not have cooled rapidly enough to turn brain tissue into glass. Instead, it is believed that a much hotter ash cloud struck the young man, dissipated quickly, and allowed for rapid cooling, resulting in the glass formation within the brain. Subsequently, the remains were buried under thick volcanic debris.

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The researchers also proposed that the young man’s skull may have played a crucial role in preventing the complete disintegration of his brain tissue in the extreme heat. The protective nature of the skull may have shielded the brain from direct contact with the ash cloud, preserving it in a glassy state.

This remarkable discovery challenges our understanding of natural processes and offers valuable insights into the unique preservation of biological tissues in extreme conditions. The study opens up new avenues for research into the formation of glass within organic matter and highlights the fascinating discoveries waiting to be unearthed in the ancient ruins of Herculaneum.

TAGGED:AncientbrainGlassHeresMountturnedVesuvius
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