Heat from the eruption in A.D. 79 was so intense that it vitrified the brain tissue of one unfortunate Herculaneum resident, a new study confirms.

In a nutshell Scientists discovered a human brain from 79 CE Vesuvius eruption transformed into glass—the only known case of natural organic glass preservation in history. The brain vitrified at temperatures above 510°C followed by extremely rapid cooling,

The eruption of Mount Vesuvius in 79 CE presented its surrounding ancient Roman communities with a number of terrifying ways to die: falling debris, collapsing buildings, asphyxiation from superheated dust plumes,