Now, Nobel’s official science bulletin says Marie Curie’s notes must be kept in a lead box because they are still radioactive and will last 1500 years. Marie Curie, born in Warsaw, Poland, graduated from the University of Paris, is a famous scientist, physicist, chemist, and the pioneer of radioactive research, known as “Madame Curie”. He discovered the radioactive elements polonium (PO) and radium (RA), and became the first person in the world to win two Nobel prizes. On July 4, 1934, Marie Curie died of illness. After a thorough examination of known chemical elements and all compounds, Madame Curie made an important discovery: an element called thorium can automatically emit invisible rays, which indicates that the phenomenon that elements can emit rays is not only the characteristic of uranium, but also the common characteristics of some elements. She called this phenomenon radioactive, and elements of this nature called radioactive elements. The radiation they emit is called radiation. Google said the proposed media negotiation rules would put its free services in Australia at “risk”