The notebooks Marie Curie filled with her research are still dangerous to touch.

Representative image of a vintage notebook, not Marie Curie’s. Photo via Pexels.
Some Curie papers have been found contaminated with radium-226, an isotope with a half-life of about 1,600 years, and original volumes are kept under strict radiation-protection controls before anyone can handle them.
More than a century after she wrote in them, the pages remain radioactively contaminated, mostly with radium-226, and the original volumes are kept under strict radiation controls. To read them at the Bibliothèque nationale de France in Paris, where they are stored in lead-lined boxes, you sign a liability waiver and put on protective clothing first.
This is not a curiosity of preservation. It is a direct consequence of the physics Curie helped uncover. Continue reading




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