Marie Curie
Radioactivity, Two Nobel Prizes, and the Cost of the Work
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The audiobook follows her journey from childhood in Poland to her life in Paris, where she earned two Nobel Prizes in physics and chemistry. It covers her work during World War I, when she developed mobile radiography units to help wounded soldiers, and her final years marked by declining health from radiation exposure.
Her legacy includes her daughter Irene Joliot-Curie, who also won a Nobel Prize. This biography offers a clear, factual account of Curie's groundbreaking scientific achievements and the personal cost of her dedication to research. Anyone interested in the history of science will find this compelling.
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Maria, nicknamed Mania, was born on November 7th, 1867, in Warsaw, which was the capital of Congress Poland under Russian rule. She was the fifth and youngest child in her family, born to teachers Bronisława, née Boguska, and Władysław Skłodowski. Her siblings included Zofia, known as Zosia; Józef, called Józio; Bronisława, nicknamed Bronia; and Helena, referred to as Hela.
On both her paternal and maternal sides, the Curie family had lost their land and wealth because of involvement in Polish uprisings seeking independence. The most recent of these was the January Uprising, which took place from 1863 to 1865. Because of this, the next generation, including young Maria and her older siblings, faced a tough path in life. Maria’s paternal grandfather, Józef Skłodowski, had been the principal of a primary school in Lublin.
Władysław Skłodowski taught mathematics and physics, subjects that Maria would later study, and was director of two Warsaw gymnasia for boys. After Russian authorities removed laboratory instruction from Polish schools, he brought lab equipment home and taught his children how to use it. He was eventually fired for pro-Polish views and had to take lower-paying jobs. The family lost money on an investment and began boarding boys to make ends meet. Maria's mother, Bronisława, ran a well-known Warsaw school for girls; she resigned after Maria was born and died of tuberculosis in May 1878, when Maria was ten. Less than three years earlier, Zofia, Maria's oldest sister, had died of typhus from a boarder. Maria's father was an atheist, her mother a devout Catholic. The deaths of both mother and sister led Maria to abandon Catholicism and become agnostic.
When Maria was ten years old, she began her education at J. Sikorska's boarding school. She later went on to a gymnasium for girls and graduated on 12 June 1883 with a gold medal. A year after that, she spent time in the countryside recovering from what may have been depression, staying with relatives of her father. The next year, she lived with her father in Warsaw, where she did some tutoring. Because women were not allowed into regular universities, she and her sister Bronisława joined a secret institution called the Flying University, a Polish patriotic school that taught women.
Marie wanted to study in Paris, but first she helped her sister Bronisława by taking a job as a home tutor in Warsaw. Later, she worked for two years as a governess with the Żorawski family, who were relatives of her father. While living there, she fell in love with Kazimierz Żorawski, a future mathematician. His parents disapproved of the match because Marie was poor, and Kazimierz couldn’t defy them. Though their romance ended sadly, he went on to become a professor and rector of Kraków University. Years later, as an old man at the Warsaw Polytechnic, he would pause before the statue of Marie Skłodowska that was erected in 1935, near the Radium Institute she founded in 1932.
In early 1889, Maria returned to her father’s home in Warsaw after another year of working as a governess. She continued tutoring, studied at the Flying University, and began practical scientific training in 1890–1891 at a chemistry lab near Warsaw’s Old Town. That lab was run by her cousin Józef Boguski, who had once worked as an assistant to the Russian chemist Dmitri Mendeleyev. Later that year, Bronisława invited Maria to join them in Paris, but she declined because she couldn’t afford university tuition. It would take her a year and a half to gather the funds. Her father eventually found a more lucrative position, helping her continue her education through reading, letters, and self-tutoring.
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In late 1891, Marie Curie arrived in Paris from Poland, staying briefly with her sister and brother-in-law before moving into a small attic in the Latin Quarter near the University of Paris. There, she threw herself into her studies of physics, chemistry, and mathematics, often going without food or warmth, wearing all her clothes to stay warm during harsh winters. She worked as a tutor at night to survive, and by 1893, she earned her degree in physics. Later that year, she began working in an industrial laboratory under Gabriel Lippmann. She continued her studies at the University of Paris and, with help from a fellowship, earned a second degree in 1894.
Skłodowska began her scientific work in Paris investigating the magnetic properties of steels, a project commissioned by the Society for the Encouragement of National Industry. That year, she met Pierre Curie, who was an instructor at ESPCI Paris, the City of Paris Industrial Physics and Chemistry Higher Educational Institution. They were brought together through Józef Wierusz-Kowalski, a Polish physicist who knew she needed more lab space. Wierusz-Kowalski thought Pierre might be able to help, and indeed he found a place for her to start working, even though she didn’t have a large laboratory of her own.
Their shared love of science brought Pierre and Skłodowska closer, and feelings developed between them. When he proposed, she at first declined, still hoping to return to Poland. She said she would go with him, even if it meant teaching French. That summer, she went back to Warsaw, where she hoped to work in her field but was blocked from Kraków University because of sexism. A letter from Pierre persuaded her to come back to Paris. Under her insistence, Curie helped compile Pierre’s research on magnetism and earned his doctorate in March 1895. That same year, he was promoted to professor at the School. A contemporary remarked that Skłodowska had been Pierre’s greatest discovery.
On 26 July 1895, Marie and Pierre Curie were married in Sceaux, choosing a civil ceremony over a religious one. Marie wore a dark blue outfit that day—something she would later use as a laboratory coat. They shared two passions: cycling long distances and traveling abroad, which deepened their bond. In Pierre, Marie found not only love but also a dependable partner and collaborator in science.
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In 1895, Wilhelm Röntgen discovered X-rays, though how they were made wasn't clear yet. The next year, Henri Becquerel found that uranium salts gave off rays similar to X-rays in how deeply they could pass through matter. Unlike phosphorescence, this radiation didn't need an outside energy source—it seemed to come from the uranium itself. Inspired by these findings, Marie Curie chose to study uranium rays for her thesis. She used a sensitive instrument called an electrometer, developed by her husband and his brother, to test samples. Her work showed that the radiation caused air around the sample to conduct electricity. From this, she concluded that the activity of uranium compounds depended only on how much uranium was present. She suggested the radiation came from the atom itself, not from molecular interactions—a bold idea that challenged the belief that atoms were unbreakable.
In 1897, Marie Curie gave birth to daughter Irène while teaching at École normale supérieure to support her family. The Curies lacked proper laboratory space, conducting research in a converted shed beside ESPCI—a former medical school dissecting room with poor ventilation and no waterproofing. They didn't know radiation exposure risks from handling radioactive materials. Though ESPCI didn't fund her work, Curie received financial support from metallurgical and mining companies, along with various organizations and governments. She studied uranium minerals—pitchblende and torbernite—and found pitchblende four times as active as uranium itself, while torbernite was twice as active. Based on earlier findings about uranium's activity, she deduced these minerals must contain another element far more radioactive than uranium. By 1898, she had identified thorium as also being radioactive. Pierre Curie grew increasingly fascinated by her research and, by mid-year, chose to abandon his studies of crystals to join her.
The research idea was entirely her own, she later wrote in her biography of her husband to make clear she had established her ownership. She understood early on that many scientists would find it hard to believe a woman could produce such original work. To secure credit for her discoveries, she chose the Académie des Sciences, the same path Becquerel had taken. Since she wasn’t a member, her paper was presented to the Académie by her former professor Gabriel Lippmann. Though Becquerel had reported his findings the day after making them and gained credit for discovering radioactivity, Curie was beaten by Gerhard Carl Schmidt in reporting that thorium gave off rays like uranium.
Marie Curie noted something extraordinary in her research: the minerals pitchblende and chalcolite showed activities far greater than uranium itself. She wrote, “The fact is very remarkable, and leads to the belief that these minerals may contain an element which is much more active than uranium.” That sparked a passionate drive to test the idea. On April 14, 1898, she and her husband began working with a 100-gram sample of pitchblende, grinding it by hand, unaware they’d eventually need to process tons of ore. In July 1898, they announced a new element they called polonium, honoring her homeland Poland, which was then divided among Russia, Austria, and Prussia. Then, on December 26, 1898, they revealed a second element, radium, named from the Latin word for “ray.” Their work also introduced the term “radioactivity” into science.
The Curies needed to prove their findings by isolating polonium and radium in pure form. They worked with pitchblende, a complex mineral, which made chemical separation extremely difficult. Polonium was easier to detect because it behaved like bismuth, and was the only bismuth-like substance in the ore. Radium, on the other hand, was more challenging since it chemically resembled barium, which also occurred in pitchblende. By 1898, they had obtained traces of radium, but it remained mixed with barium. To separate it, they used differential crystallization. After processing a tonne of pitchblende, they isolated one-tenth of a gram of radium chloride in 1902. Ten years later, in 1910, she finally obtained pure radium metal. She never succeeded in isolating polonium, which remained just beyond reach.
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In December 1903, the Royal Swedish Academy of Sciences gave the Nobel Prize in Physics to Pierre Curie, Marie Curie, and Henri Becquerel for their joint research on radiation phenomena. At first, the committee only wanted to honor Pierre and Henri, but a supporter of women scientists, Magnus Gösta Mittag-Leffler, told Pierre about it, and Marie's name was added. She became the first woman ever awarded a Nobel Prize. The Curies didn't travel to Stockholm to accept it; they were too busy and Pierre disliked public events. They finally went in 1905 to give their lecture. The prize money helped them hire their first lab assistant. Afterward, the University of Geneva offered Pierre a job, which led the University of Paris to give him a professorship. But they still lacked a proper lab, and it wouldn't be ready until 1906.
In December 1904, Marie Curie welcomed her second daughter, Ève. She selected Polish governesses to teach her daughters their native language and arranged for them to visit Poland. Then, on 19 April 1906, Pierre Curie died suddenly in a road accident. He was walking through heavy rain on Rue Dauphine when a horse-drawn cart struck him, leaving him fatally injured beneath the wheels. The loss devastated Marie. Just over a month later, on 13 May 1906, the physics department at the University of Paris voted to keep the professorial chair that had been established for her late husband and offer it to her. She accepted the position, determined to build a world-class laboratory in his honor. In doing so, she became the first woman to hold a full professorship at the university.
Marie Curie’s work led her to build a new lab, not just at the University of Paris, but at the Radium Institute, which she helped create with the Pasteur Institute and the university. The idea came from Émile Roux, director of the Pasteur Institute, who was upset that Curie wasn’t getting proper lab space. Only after threats of her leaving did the university agree to join the project. In 1910, Curie isolated radium and set a standard for radioactive emissions named the curie. But in 1911, the French Academy of Sciences narrowly rejected her election, choosing instead Édouard Branly, an inventor who worked with Marconi. It wouldn’t be until 1962 that another woman, Marguerite Perey, a student of Curie’s, was elected to the academy.
Despite her fame as a scientist working for France, Marie Curie faced xenophobia, with some claiming she was Jewish. During her nomination for the French Academy of Sciences, right-wing press vilified her as a foreigner and atheist. Her daughter later noted the press's hypocrisy—portraying her as an unworthy foreigner when nominated for a French honor, but as a heroine when she won foreign awards like her Nobel Prizes. In 1911, a scandal erupted when it was revealed she had an affair with physicist Paul Langevin, a married man and former student of Pierre Curie's. The press misrepresented her as a foreign Jewish woman who had destroyed his marriage. When the story broke, Curie was at a conference in Belgium. Upon returning, she found an angry mob outside her house and had to hide with her daughters in the home of her friend Camille Marbo.
Marie Curie had already won international acclaim for her work when the Royal Swedish Academy of Sciences awarded her a second Nobel Prize in 1911, this time in Chemistry. She was recognized for discovering radium and polonium, isolating radium, and studying its properties. The committee's chair, Svante Arrhenius, tried to block her from attending the ceremony, citing her personal life due to the Langevin scandal. But Curie insisted she would be there, stating simply, "the prize has been given to her for her discovery of polonium and radium" and that "there is no relation between her scientific work and the facts of her private life." She became the first person to win or share two Nobel Prizes, a record she shares with Linus Pauling. A group of prominent Polish intellectuals, led by novelist Henryk Sienkiewicz, urged her to return to Poland to continue her research.
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During World War I, Marie Curie understood that saving lives depended on getting wounded soldiers operated on as quickly as possible. She recognized the need for field radiological centres near the front lines to help battlefield surgeons, often avoiding amputations by saving limbs that could otherwise be lost. After a quick study of radiology, anatomy, and automotive mechanics, she gathered X-ray equipment, vehicles, and generators, and developed mobile radiography units called petites Curies. She procured the tools and knowledge to create these field hospitals, becoming the director of the Red Cross Radiology Service. By late 1914, she had established France's first military radiology centre. Assisted at first by a military doctor and her 17-year-old daughter Irène, she oversaw the installation of 20 mobile radiological vehicles and another 200 units at field hospitals in the war's first year. Later, she began training other women as aides.
In 1915, Marie Curie developed hollow needles filled with "radium emanation," a colorless, radioactive gas from radium later identified as radon, to treat infected tissue. She used her own one-gram supply of radium for this work. Her X-ray units helped treat an estimated million wounded soldiers during the war. Though she was deeply involved in this humanitarian effort, she did little scientific research during that time. Despite all her contributions to France’s war effort, she never received formal recognition from the French government.
Shortly after the war began, Marie Curie tried to give her gold Nobel Prize medals to support the effort, but the French National Bank turned her down. She chose instead to purchase war bonds, using funds from her prize money. She said:
She decided to part with the small amount of gold she owned, and also the scientific medals that no longer meant anything to her. There was something else: because of laziness, the money from her second Nobel Prize had been left in Stockholm, in Swedish crowns, and that was the largest sum they had. She wanted to bring it back and put it toward war loans, since the state needed it. But she knew there was no use pretending otherwise—this money would most likely be lost.
She remained deeply involved with Polish causes even after the war, serving on committees of Poles in France committed to supporting their homeland. In 1919, she published a book based on her wartime work, titled Radiology in War.
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In 1920, on the 25th anniversary of discovering radium, the French government created a stipend for Marie Curie, a honor previously given to Louis Pasteur in 1874. The following year, she traveled to the United States to raise money for radium research. Marie Mattingly Meloney, after interviewing her, formed the Marie Curie Radium Fund and promoted Curie’s visit across the country.
In 1921, U.S. President Warren G. Harding welcomed Marie Curie at the White House, where she received a gram of radium collected in the United States. Before the meeting, the French government had offered her a Legion of Honour award, recognizing her growing fame abroad, but she refused it. The following year, 1922, she was named a fellow of the French Academy of Medicine. She continued traveling, giving lectures and appearing publicly in Belgium, Brazil, Spain, and Czechoslovakia.
Under Marie Curie’s leadership, the institute she founded went on to produce four more Nobel Prize winners, including her daughter Irène Joliot-Curie and her son-in-law, Frédéric Joliot-Curie. At one point, it became one of the world's four major centers for radioactivity research. The others were the Cavendish Laboratory in Cambridge, led by Ernest Rutherford; the Institute for Radium Research in Vienna, with Stefan Meyer; and the Kaiser Wilhelm Institute for Chemistry in Berlin, where Otto Hahn and Lise Meitner worked.
In August 1922, Marie Curie joined the League of Nations’ newly formed International Committee on Intellectual Cooperation, where she worked with Albert Einstein, Hendrik Lorentz, and Henri Bergson. She served on the committee until 1934. The same year, she published a biography of her late husband, Pierre Curie. In 1925, she visited Poland for the groundbreaking ceremony of Warsaw’s Radium Institute. Her second American tour in 1929 helped fund the institute, which opened in 1932 under the direction of her sister Bronisława. In 1930, she was elected to the International Atomic Weights Committee, a role she held until her death. That same year, she also received the Cameron Prize for Therapeutics from the University of Edinburgh.
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Marie Curie returned to Poland in early 1934 for what would be her final visit. Just months after that, on July 4th, 1934, she passed away at the age of sixty-six. She died at the Sancellemoz sanatorium in Passy, Haute-Savoie. Her death was from aplastic anaemia, a condition thought to stem from prolonged exposure to radiation, which had damaged her bone marrow.
In 1995, when her remains were examined, the French Office de Protection contre les Rayonnements Ionisants (OPRI) determined Marie Curie hadn’t been exposed to dangerous amounts of radium during her lifetime. They noted that radium is only harmful if swallowed, and suggested her illness likely came from X-rays she received while working as a radiologist in field hospitals during the First World War. At the time, she had carried test tubes of radioactive material in her pockets and kept them in her desk drawer, commenting on how they glowed faintly in the dark.
She was buried in Sceaux, next to her husband Pierre. In 1995, their remains were moved to the Paris Panthéon because of their achievements. Their graves were lined with lead due to radioactivity. Radium-226 has a half-life of about 1,600 years, so her notebooks will stay radioactive for over a thousand years. She became the second woman buried at the Panthéon, after Sophie Berthelot, and the first woman honored with interment there on her own merits.
Because of the high levels of radioactive contamination, Marie Curie’s papers from the 1890s are now too dangerous to handle directly. Even her cookbooks have become highly radioactive over time. Her documents are stored in lead-lined boxes, and anyone who wants to read them must wear protective clothing. In the final year of her life, she was working on a book titled Radioactivity, which was published after her death in 1935.
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The work of Marie and Pierre Curie helped shape the modern world, influencing everything from nuclear physics to medical treatments. Her research into radioactivity laid the groundwork for advances in cancer therapy and radiography that are still used today. The methods she developed for isolating radioactive isotopes remain part of scientific practice in both research and medicine. Cornell University professor L. Pearce Williams observes:
The Curies' work changed everything. Radium’s radioactivity was so intense it couldn’t be ignored, and it challenged the idea that energy can't be created or destroyed. This forced scientists to rethink the basics of physics. Ernest Rutherford used radium to study atoms, which led him to propose the nuclear model of the atom. In medicine, radium offered hope for treating cancer.
Marie Curie’s contributions went far beyond the lab, reshaping not just physics and chemistry but also how society viewed women in science. Her path was blocked at every turn because she was a woman, whether in her home country or the one where she made her life. Yet she pressed forward, and in doing so, she helped open doors for others. At the Radium Institute, she mentored young female scientists, showing them that they too could succeed in fields that had long excluded them. Her legacy lives on not just in her discoveries, but in the generations of women who followed her lead.
Marie Curie lived simply, returning a small scholarship in 1897 as soon as she began earning money on her own. She gave much of her first Nobel Prize money to those around her—friends, family, students, and colleagues. She chose not to patent the process for isolating radium, allowing other scientists to pursue their research without obstruction. Curie asked that any awards or gifts be directed toward the institutions she worked with rather than to herself. She and her husband often refused medals and honors. Albert Einstein once said she was probably the only person who could not be corrupted by fame.
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