> ... scientists have discovered that his brain was preserved when it turned to glass in an extremely hot cloud of ash.
> The pea-sized chunks of black glass were found inside the skull of the victim, aged about 20, who died when the volcano erupted in 79 AD near modern-day Naples.
> ... a cloud of ash as hot as 510C enveloped the brain ...
I don't think I'd use the word "preserved" to describe there being a few glassy cinders left over, after someone's brain was incinerated.
> The pea-sized chunks of black glass were found inside the skull of the victim, aged about 20, who died when the volcano erupted in 79 AD near modern-day Naples.
> ... a cloud of ash as hot as 510C enveloped the brain ...
I don't think I'd use the word "preserved" to describe there being a few glassy cinders left over, after someone's brain was incinerated.