The gory discovery - published on Thursday in "The New England Journal of Medicine' - is a rarity in archaeology, and researchers called the find from the ruins of Herculaneum near Pompeii "sensational".
Herculaneum lies about 11 miles (20 kilometers) from Pompeii, also famously buried by the eruption, and sits closer to the base of Vesuvius.
Studies on the ribs of 152 skeletons showed that residents died not because of extreme heat but because of toxic gasses, they found. Collagen that remained in the bones was "inconsistent with vaporisation", Teesside said in a statement.
Tests of the glassy material have revealed several proteins that are common in human brain tissue, as well as fatty acids that are found in human hair and brain triglycerides, said lead researcher Dr. Pier Paolo Petrone, a biomedical researcher at the University of Naples Federico II in Italy.
Herculaneum was buried under volcanic ash and lava.
And Petrone believes teh victim may have been a caretaker for the building, which was used to worship a former emperor. Analyzing charred wood near the victim allowed the team to know that a maximum temperature of 520 degrees Celcius (968 Fahrenheit) was reached.
A team of Italian researchers found what is possibly pieces of brain tissue but not in a state that one would expect.
"They were small black fragments with a glassy appearance, something like obsidian, but definitely more fragile", continued Petrone.
Recommended Reading: Facial recognition, police and privacy
This is the facial recognition service offered by Clearview AI, a little-known start-up that has devised a facial recognition app. It was restricted subsequently to recognize only people identified as Facebook friends of the app user.
Trump is 'a conman and a narcissist — George Soros
The greatest shortcoming of dictatorships is that when they are successful, they don't know when or how to stop being repressive. In his speech , the billionaire once again mentioned Hungarian Prime Minister Viktor Orbán, calling him "Hungary's ruler".
England's Ben Stokes apologises for swearing at fan in South Africa test
England have asked for increased security after a number of players and support staff were abused by the crowd. Multiple reports suggest that the cricketer did not take kindly to being unfavourably compared to Ed Sheeran.
In an email to the news outlet, Petrone said that the eruption's intense heat burst the man's skull open which exposed the "shining black glassy material" inside. Following the brief blast of heat, the body would have rapidly cooled, leaving behind the grisly remains of an exploded skull coated in vitrified brain bits, the authors noted.
Hundreds of others fled to the beach in a vain attempt to escape disaster as Vesuvius blew, and a new study by researchers at Teesside University in the United Kingdom says that here the temperatures of the deadly pyroclastic flows were likely too low to have killed them instantly.
Resembling obsidian stone, they were unlike anything else he had seen, even after studying dozens of other Vesuvius victims. The man with the glass brain was discovered further back from the water.
Herculaneum's proximity to the volcano meant its residents met a particularly gruesome fate as the steam from their boiling blood built up a level of pressure in their skulls that caused their heads to explode.
The remains were unearthed in Herculaneum in the 1960s.
Study co-author Piero Pucci of the Centro di Ingegneria Genetica-Biotecnologie Avanzate in Naples found that the proteins within the material matched those known to be found in different areas of the human brain.
This suggests "extreme radiant heat was able to reignite body fat and vaporise soft tissues", before a "rapid drop in temperature", the report says.