The 31,000-Year-Old Children’s Teeth Found Above The Arctic Circle — And The DNA Test That Revealed A Lost Ice Age Population Connected To Native American Origins
But tooth enamel — the hard, mineralized outer coating of a tooth — is the densest biological material in the human body.
It is more resistant to chemical degradation than bone, and the pulp chamber inside a tooth, protected by that enamel shell, can preserve cellular material including DNA better than most other tissue types in ancient specimens.
The deciduous teeth at Yana, encased in enamel and embedded in frozen sediment for 31,000 years, were exceptional repositories of ancient biological information.
The DNA inside them — inside the dentine of the teeth themselves, in the remnant cellular material of the pulp — had survived in recoverable form.
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