Long before humans built cities or wrote words, our ancestors may have faced a hidden threat that shaped who we became. Scientists studying ancient teeth found that early humans, great apes, and even Neanderthals were exposed to lead millions of years ago. This toxic metal can damage the brain, yet modern humans developed a tiny genetic change that protected our minds and allowed language and intelligence to flourish.
Sunday 19 October 2025
sciencedaily - 3 days ago
From poison to power: How lead exposure helped shape human intelligence
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