Irène Curie was born in Paris on September 12, 1897. She was the first daughter of Marie Curie and Pierre Curie, scientists who weren’t well known yet at the time of Irène’s birth. Things have changed quickly in a few years. Wilhelm Roentgen has just recently discovered the X-rays in 1895, but it was not yet understood what caused their existence. After Henri Becquerel discovered that uranium salts emitted rays