A 2,000-year-old man who died during the Mount Vesuvius eruption had his brain turned into glass due to extreme conditions. Researchers analyzed the strange material found in his skull and spine, concluding that a super-heated ash cloud caused tissue to liquify before rapidly cooling into glass. This unique event has preserved some brain structures, providing valuable insights into ancient human biology.
Source: https://www.nature.com/articles/d41586-025-00643-w