Story perspectives

Lead Exposure: A Two-Million-Year Evolutionary Challenge

11/16/2025

50 4

Summary

Story summary

Lead exposure has shaped human evolution for more than two million years, challenging the view that it is a modern issue.
Researchers from Southern Cross University, Mount Sinai Hospital, and the University of California, San Diego traced lead in fossil teeth, indicating environmental exposure, not industrial sources.
Lab-grown brain organoids show Neanderthal variants of the NOVA1 gene were more disrupted by lead, implying modern humans may have evolved protections.

1 of 1

Story summary

Lead exposure has shaped human evolution for more than two million years, challenging the view that it is a modern issue.
Researchers from Southern Cross University, Mount Sinai Hospital, and the University of California, San Diego traced lead in fossil teeth, indicating environmental exposure, not industrial sources.
Lab-grown brain organoids show Neanderthal variants of the NOVA1 gene were more disrupted by lead, implying modern humans may have evolved protections.