Marie Curie

By Julien Moreau

She carried test tubes of radium in her pockets and kept a glowing vial by her bed, because she did not yet know that wonder and poison could be the same thing. Maria Skłodowska was born in 1867 in Warsaw, then under the boot of the Russian Empire, where Polish girls were forbidden a university education. She studied in a clandestine school, worked years as a governess to fund her sister's medical studies, and arrived at the Sorbonne in 1891 with little money and ferocious resolve. There she met Pierre Curie, a physicist who loved crystals and simplicity; they married in 1895 and became the most consequential scientific couple in history. For her doctorate, Marie chose Henri Becquerel's strange uranium rays and proved they came from the atom itself, not from any chemical reaction — she named the phenomenon radioactivity. In 1898, working in a leaking shed on the Rue Lhomond, the Curies announced two new elements: polonium, named for her occupied homeland, and radium, which glowed with impossible energy. To isolate a tenth of a gram of pure radium they processed tons of pitchblende by hand. In 1903 she became the first woman to win a Nobel Prize, in physics, shared with Pierre and Becquerel. Pierre was killed by a horse-drawn cart in 1906; Marie took his Sorbonne chair — the first woman professor there — and kept working through grief. In 1911 she won a second Nobel, this time in chemistry, alone, for the isolation of pure radium. During the First World War she built mobile X-ray units, the 'Little Curies,' drove them to the front herself, and trained women to operate them. She founded the Radium Institute in Paris, a temple of the new science. The radiation she had spent a lifetime studying finally killed her: she died of aplastic anemia in 1934. Her daughter Irène would win a Nobel too. Her notebooks remain radioactive to this day.

Impact on civilization

Marie Curie created radioactivity as a science and changed the meaning of what a woman could be. She remains the only person to win Nobel Prizes in two different sciences. Her work founded nuclear physics and chemistry, enabled radiation therapy and medical imaging, and turned the atom from a philosophical idea into a physical object that could be weighed, measured, and used. Every cancer patient treated with radiotherapy walks in her shadow. Her mobile X-ray units pioneered battlefield radiology, and the Curie Institute she founded remains a world leader in cancer research — a century on, her name still means science in service of humanity.