A man's brain was partly turned into glass after Mount Vesuvius erupted. Researchers discovered dark fragments resembling obsidian in the skull of a man in the ancient settlement of Herculaneum.

Some preserved brains even resemble soap. But now they've found something new: a brain that turned into glass. In a paper published Thursday in the journal Scientific Reports, archaeologists and ...

Nearly 2,000 years after a young man died in the Vesuvius volcanic eruption, scientists have discovered that his brain was preserved when it turned to glass in an extremely hot cloud of ash.