Smuggled into an education
Marie Curie was born Maria Skłodowska in Warsaw in 1867, when Poland was under Russian imperial control and the occupying government had restricted formal higher education for women specifically to suppress Polish intellectual life. She and her sister attended a secret, illegal underground institution nicknamed the "Flying University," which moved locations to avoid detection. To fund her sister's medical studies in Paris first, young Maria worked for years as a governess, saving money and studying independently at night — an arrangement the two sisters had agreed on, trading turns supporting each other's education. She finally arrived in Paris herself in 1891, enrolled at the Sorbonne, and, living in genuine poverty in a small unheated garret, earned degrees in physics and mathematics, finishing at the top of her physics class.
A partnership, and a discovery that needed a new word
In Paris she met and married physicist Pierre Curie in 1895, beginning both a marriage and a scientific partnership. Working from Henri Becquerel's 1896 discovery that uranium emitted some kind of mysterious ray on its own, without any external energy source, Marie Curie set out to systematically investigate the phenomenon — and it was she who coined the term "radioactivity" to describe it. She showed the effect wasn't a special property of uranium alone but a more general phenomenon rooted in the atom itself — a genuinely new idea at the time, since atoms were still widely assumed to be indivisible, unchanging, stable building blocks.
Pursuing the source of stronger-than-expected radioactivity in a mineral called pitchblende, Marie and Pierre painstakingly processed tons of raw ore, by hand, in a leaky, poorly ventilated shed, to isolate the source. In 1898 they identified two entirely new chemical elements: polonium (which Marie named after her native Poland, a quiet act of political defiance toward the empire that had occupied it) and radium. Isolating just one-tenth of a gram of pure radium chloride took nearly four more years of relentless physical labor.
She wasn't confirming something scientists suspected was there. She was proving that atoms — the supposed unchangeable foundation of matter — could break down and release energy on their own. That single idea reorganized physics.
Two Nobel Prizes, a scientific first that still stands
In 1903, the Nobel Prize in Physics was awarded jointly to Marie Curie, Pierre Curie, and Henri Becquerel for their research into radioactivity — making Marie Curie the first woman ever to win a Nobel Prize in any category. (The Nobel committee had initially considered honoring only Pierre and Becquerel; it was Pierre himself who insisted, in writing, that Marie's contribution be formally recognized.) After Pierre's sudden death in 1906 — struck by a horse-drawn cart in a Paris street — Marie took over his professorship at the Sorbonne, becoming the university's first female professor in its centuries-long history, and continued the research alone.
In 1911, she won a second Nobel Prize — this time in Chemistry, solely to her, for the discovery of radium and polonium and for isolating pure radium metal. To this day, she remains the only person, of any gender, to win Nobel Prizes in two different scientific fields.
Turning the discovery toward saving lives — literally, on the battlefield
When World War I broke out in 1914, Curie recognized that X-ray imaging could help battlefield surgeons locate bullets and shrapnel and guide treatment — but portable X-ray equipment barely existed, and military hospitals near the front had none. She personally designed mobile X-ray units, nicknamed "petites Curies" ("little Curies") by the soldiers who used them, fitted into cars she helped source and equip herself. She learned to drive and to operate the equipment, trained roughly 150 women as X-ray technicians, and personally worked near the front lines operating and repairing the units. Historians estimate the mobile radiology units she organized examined over a million wounded soldiers over the course of the war. This is a genuinely underappreciated part of her legacy: a Nobel-winning physicist who spent years doing hands-on, physically demanding, dangerous field work to apply her research directly to saving lives in real time.
The institute, and the field she helped found
Curie went on to found the Radium Institute in Paris (completed in 1914, today the Institut Curie) together with the Pasteur Institute: her laboratory studied radioactivity, while a biology laboratory under the physician Claudius Regaud studied its medical uses. It became — and remains — one of the world's leading cancer research centers. Radiotherapy itself began within months of the discovery of X-rays in 1895–96, and doctors were treating tumors with radium by the early 1900s; the Curies' isolation of radium made that "Curietherapy" possible, and the Institute became one of its great pioneers. Radiotherapy remains one of the primary tools in cancer treatment worldwide, over a century later. Her daughter Irène Joliot-Curie, who had assisted her mother with the mobile X-ray units as a teenager during the war, went on to win her own Nobel Prize in Chemistry in 1935 — making the Curies the only mother-daughter pair to both win Nobel Prizes in the sciences.
The cost she paid for the discovery
Curie died in 1934 of aplastic anemia, a bone marrow disease now widely attributed to her decades of prolonged, essentially unprotected exposure to radioactive materials — a risk nobody, including her, fully understood at the time, since the health dangers of radiation exposure were still unknown when her research began. She had carried test tubes of radium in her pockets and stored them in her desk drawer, and reportedly kept a sample by her bed at night because she loved the soft glow it gave off in the dark. Her laboratory notebooks, and even some of her personal effects, remain measurably radioactive to this day — held in lead-lined boxes at the French National Library, and only viewable by researchers wearing protective equipment and signing a liability waiver. It's a striking, sobering detail: the tools of her discovery are still, physically, dangerous nearly a century after her death.
Why she belongs on this list
Radioactivity research opened the door to nuclear physics, nuclear medicine, and radiotherapy — an entire branch of cancer treatment that has since extended or saved a very large, though inherently hard-to-precisely-count, number of lives. Beyond the specific science, Curie's career forced open doors — for women in physics, in chemistry, and in serious scientific institutions generally — that had been deliberately, systematically closed. She didn't set out to be a symbol; she set out to understand what was making pitchblende glow. That she became both, without softening the rigor of the second to achieve the first, is a large part of why her name is still, everywhere, shorthand for scientific brilliance under real adversity.
The takeaway
Marie Curie discovered radioactivity as a property of the atom itself, identified two new elements (polonium and radium) through years of grueling physical labor, and remains the only person ever to win Nobel Prizes in two different sciences — physics in 1903 and chemistry in 1911. Beyond the discovery itself, she personally built and operated mobile X-ray units that treated over a million wounded soldiers in World War I, and founded a cancer research institute that helped develop radiotherapy as a lasting medical treatment. She died from the cumulative effects of the very radiation she pioneered studying — a cost she paid before its dangers were understood.
Try this: next time cancer treatment or an X-ray comes up in conversation, mention that both trace, directly and specifically, back to one woman spending years hand-processing tons of ore in a leaky shed to isolate one-tenth of a gram of a new element.
Sources & Further Reading
Sources
- Marie Curie's education, the 1898 discovery of polonium and radium, her two Nobel Prizes (Physics 1903, Chemistry 1911), Pierre Curie's death, her Sorbonne professorship, the WWI mobile X-ray program, the Radium Institute, her 1934 death from aplastic anemia, and the continued radioactivity of her papers are all extensively documented history, corroborated by the Nobel Foundation's own records and multiple biographies.
Go deeper
- 📘 Radioactive: Marie & Pierre Curie, A Tale of Love and Fallout — Lauren Redniss (a visually striking, well-researched account)
- 📘 Marie Curie: A Life — Susan Quinn (a thorough, well-regarded biography)
- 🌐 The Nobel Prize — Marie Curie, Facts (official record of both prizes)
- 🌐 Companion piece in this library, elsewhere in History-Makers: Louis Pasteur and Nikola Tesla