Roman Empire, lead

Exposure to lead from mining probably lowered I.Q. levels in the empire, research has found. It might be the world’s first ...
"A 2 to 3 points lower IQ doesn't sound like much, but when you apply that to the entire European population, it's quite a ...
DRI scientists analyzed Arctic ice core records to reconstruct historical atmospheric lead pollution from Ancient Rome, ...
The Roman Empire lowered IQ levels across Europe according to a new study, due to the vast quantities of lead pollution.