These 1,000-year-old, blue-specked teeth could rewrite medieval history
![](https://www.popsci.com/sites/popsci.com/files/styles/1000_16x9/public/images/2019/01/189408_web.jpg?itok=jpFfl6Ji&fc=50,50)
![Dental calculus jaw and teeth photo](https://www.popsci.com/sites/popsci.com/files/styles/1000_16x9/public/images/2019/01/189408_web.jpg?itok=jpFfl6Ji&fc=50,50)
Lapis lazuli was hard to get your hands—or mouth—on.
A new study uses analysis of dental calculus to show the crucial role a woman played in medieval manuscript illumination.
via Popular Science "http://bit.ly/2AEmhN0"
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