Marie Curie’s belongings still have radioactive residue in the present day. Marie Curie’s contributions to science had her named by many as the mother of modern physics. One of the works she was most known for was her study of radioactive materials and the discovery of elements such as polonium and radium. However, her research took a toll on her health. Radioactive exposure not only led to her death due to aplastic anaemia – but her clothes, furniture, and books remain radioactive to this day. Now, over a century later, her notebooks have to be stored in a lead box, as they will still be radioactive for another 1,500 years.