They look like small pieces of obsidian ... s brain was the only one to form glass fragments. It might have been because he was sheltered inside the building, says Giordano.

A man, thought to be the custodian of a religious group, was believed to be in his bed asleep, when a super-hot ash cloud hit ...

Pic: Reuters/Pier Paolo Petrone The man was first discovered in the 1960s inside a building called the ... shiny surfaces quite similar to obsidian, a natural glass of volcanic origin - black ...