08-02-2011, 08:11 AM
Because of their levels of radioactivity, her papers from the 1890s are considered too dangerous to handle. Even her cookbook is highly radioactive. They are kept in lead-lined boxes, and those who wish to consult them must wear protective clothing.[31]
http://en.wikipedia.org/wiki/Marie_Curie
http://en.wikipedia.org/wiki/Marie_Curie