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Roman Lead Pollution Linked to 3-Point IQ Decline

1/7/2025

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Summary

Story summary

A groundbreaking study in *Proceedings of the National Academy of Sciences* uncovers a startling impact of lead pollution from the Roman Empire, suggesting it may have lowered average IQ by 2.5 to 3 points. By examining Arctic ice cores, researchers connected heightened lead levels to mining and smelting, revealing a hidden cost to cognitive health during the Pax Romana.

History

Historical Context

A recent study reveals that lead pollution from the Roman Empire may have reduced average IQ by 2.5 to 3 points. This pollution stemmed from extensive mining and smelting during the Pax Romana, a period marked by urbanization and poor sanitation. Similar to today's environmental concerns, the Romans faced health impacts from industrial practices, highlighting a historical precedent for the hidden costs of economic progress.

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Story summary

A groundbreaking study in *Proceedings of the National Academy of Sciences* uncovers a startling impact of lead pollution from the Roman Empire, suggesting it may have lowered average IQ by 2.5 to 3 points. By examining Arctic ice cores, researchers connected heightened lead levels to mining and smelting, revealing a hidden cost to cognitive health during the Pax Romana.

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