Marie Curie’s Radioactive Notebooks Are Still Lethal — Even After 100 Years

In a quiet archive in Paris, certain books are not shelved like the rest. They are sealed away, wrapped, labeled, and approached with a caution that feels out of place for paper and ink. More than a century after they were written, Marie Curie’s laboratory notebooks still demand protective gear to handle them. Not because of what they say, but because of what they carry. This is not a metaphor. The pages themselves remain radioactive. For many, Marie Curie represents scientific brilliance, perseverance, and progress. Her discoveries reshaped physics and medicine, opening doors to X-rays, cancer treatments, and atomic research. But tucked behind that legacy is a quieter, unsettling reality: some of the materials she worked with never stopped emitting…