Marie Curie is Still Radioactive

Did you know that Marie Curie's body will be radioactive for another 1,500 years.
Her body was therefore placed in a coffin lined with nearly an inch of lead.
Marie Curie’s century-old notebooks are still radioactive as well, so they’re kept in lead-lined boxes for protection against radiation exposure.
Anyone wishing to handle her notebooks, personal effects, or other items have to wear protective gear and sign a liability waiver.

Marie Curie a short biography