We asked Aicher, author of "Guide to the Aqueducts of Ancient Rome," about the Romans ... looking at the big picture. What would Rome and the Roman Empire have been like without their aqueducts?

The Roman Empire lowered IQ levels across Europe according to a new study, due to the vast quantities of lead pollution.

Lead exposure is responsible for a range of human health impacts, with even relatively low levels impacting the cognitive development of children. Scientists have previously used atmospheric pollution ...