Maria Salomea Skłodowska was born in Warsaw on November 7, 1867, the fifth and youngest child of Władysław Skłodowski and Bronisława Skłodowska (née Boguska), both teachers from families of the Polish minor nobility whose fortunes had declined through patriotic involvement in Polish national uprisings.¹² Her father taught mathematics and physics and served as director of two Warsaw gymnasia for boys, while her mother ran a prestigious Warsaw boarding school for girls.¹³ Her older siblings were Zofia, Józef, Bronisława, and Helena. When Russian imperial authorities eliminated laboratory instruction from Polish schools and demoted her father for his pro-Polish sentiments, Władysław brought laboratory apparatus home and instructed his children in its use.¹⁴

The family endured severe financial and personal losses during Skłodowska's childhood.¹⁵ Her father lost the family's savings in a failed investment, forcing them to take in student boarders. Her eldest sister, Zofia, died of typhus in 1876, and her mother died of tuberculosis in May 1878, when Maria was ten years old.¹⁶ Despite these hardships, Skłodowska excelled academically at a Russian-run gymnasium for girls, graduating on June 12, 1883, at the age of fifteen with a gold medal as the top student in her class. Following a year of recuperation in the countryside with relatives after a period of exhaustion and depression, she returned to Warsaw.

Because the Russian-administered University of Warsaw did not admit women, Maria and her sister Bronisława enrolled in the Flying University, an underground Polish educational institution that held classes in secret locations to evade Tsarist authorities and admitted female students. The two sisters forged a mutual financial pact: Maria would work as a tutor and governess in Poland to fund Bronisława's medical studies in Paris, and once Bronisława established herself, she would finance Maria's higher education. Beginning in 1885, Skłodowska worked as a governess first in Krakow and then for several years in Szczuki for the Żorawski family, relatives of her father. There she fell in love with the family's eldest son, Kazimierz Żorawski, a future mathematician, though his parents opposed a marriage due to her lack of wealth. Returning to Warsaw in 1889, she continued tutoring while conducting her first practical chemistry and physics experiments in a clandestine laboratory disguised within Warsaw's Museum of Industry and Agriculture, run by her cousin Józef Boguski.

In late 1891, at the age of twenty-four, Skłodowska departed Poland for France. After living briefly with her sister Bronisława and her brother-in-law, physician and political activist Kazimierz Dłuski, she rented a sparse garret apartment in the Latin Quarter near the University of Paris (the Sorbonne) to minimize commuting time and expenses.¹⁷¹⁸ Registering under the French form of her name, Marie, she lived in near-poverty, studying through frigid winters with little heat or food while remedying gaps in her formal mathematical and scientific preparation. She studied under prominent French scientists including physicists Gabriel Lippmann and Edmond Bouty and mathematicians Paul Appell and Henri Poincaré. Her dedication yielded rapid results: she earned her licence (equivalent to a master's degree) in physics in 1893, ranking first in her class, and supported by an Alexandrowitch scholarship for Polish students, completed a second degree in mathematics in 1894, ranking second.¹⁹

In early 1894, the Society for the Encouragement of National Industry commissioned Skłodowska to investigate the magnetic properties of various steels, working in Lippmann's laboratory. Searching for larger laboratory space, she was introduced in the spring of 1894 by Polish physicist Józef Wierusz-Kowalski to Pierre Curie, an instructor and laboratory head at the Municipal School of Industrial Physics and Chemistry (ESPCI) in Paris. Though eight years her senior and without a doctorate at the time, Pierre Curie had already achieved international recognition alongside his brother Jacques for discovering piezoelectricity and for formulating laws governing magnetism and crystal symmetry.

Mutual scientific devotion quickly developed into courtship.²⁰ When Skłodowska returned to Warsaw in the summer of 1894, intending to settle permanently in her homeland, she was denied a position at Krakow's Jagiellonian University because of her sex. Persuaded by letters from Pierre Curie, who offered to move to Poland if necessary to be with her, she returned to Paris in October 1894. After Pierre earned his doctorate in March 1895, the two were married on July 26, 1895, in a civil ceremony at the town hall of Sceaux, a suburb south of Paris where Pierre's parents lived.²¹ Rejecting a religious service and wedding rings, Marie wore a dark blue wool outfit that subsequently served as her laboratory attire. The couple had two daughters: Irène, born on September 12, 1897, and Ève, born on December 6, 1904.

In late 1897, after completing her steel magnetism research and giving birth to Irène, Marie Curie sought a topic for her doctoral dissertation. She chose to investigate "uranium rays," a phenomenon discovered in 1896 by French physicist Henri Becquerel, who had observed that uranium salts spontaneously emitted rays capable of fogging photographic plates through opaque paper without prior exposure to sunlight. Unlike Roentgen's recently discovered X-rays, which excited widespread interest, Becquerel's rays had attracted comparatively little investigation.

In December 1903, the Royal Swedish Academy of Sciences awarded the Nobel Prize in Physics jointly to Henri Becquerel, Pierre Curie, and Marie Curie "in recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena discovered by Professor Henri Becquerel".²⁷ Initially, the nominating committee in Paris had submitted only the names of Becquerel and Pierre Curie. Swedish mathematician Magnus Gösta Mittag-Leffler, a supporter of women in science and a member of the committee, privately alerted Pierre, who protested that a prize on radioactivity excluding Marie would be a travesty, leading to a formal nomination of Marie and her inclusion in the award. Due to ill health and teaching obligations, the Curies did not travel to Stockholm until June 1905, when Pierre delivered the Nobel Lecture. The prize money provided financial stability, allowing Pierre to assume a newly created professorship in physics at the University of Paris in 1904 while Marie was appointed chief of laboratory work.

On April 19, 1906, during a heavy rainstorm in Paris, Pierre Curie slipped while crossing the Rue Dauphine and was fatally crushed beneath the wheel of a horse-drawn wagon carrying military uniforms. Devastated by the loss of her husband and scientific partner, Marie Curie rejected a state pension offered by the French Ministry of Public Instruction. On May 13, 1906, the physics department of the University of Paris decided to retain the chair created for Pierre and offered it to Marie as an assistant professor, promoting her to full professor in 1908. When she delivered her inaugural lecture on November 5, 1906, to a packed hall of students, journalists, and curiosity-seekers, she became the first woman to teach at the Sorbonne in its 650-year history, resuming her husband's final discourse at the exact point he had left off.

During the ensuing years, Curie worked to establish an international standard for radium emissions and to counter a claim by British physicist Lord Kelvin that radium was not an element but a compound of lead and helium. In 1910, working alongside her collaborator and former student André-Louis Debierne, she succeeded in isolating pure metallic radium through the electrolysis of molten radium chloride using a mercury cathode, proving its elemental identity beyond dispute.

In late 1910, at the urging of colleagues, Curie put her name forward for a vacant physicist seat in the prestigious French Academy of Sciences.²⁸ Her candidacy triggered a fierce debate in the French press, pitting liberal and anticlerical supporters against conservative, nationalist, and clerical newspapers that attacked her as a woman, a foreigner, and a freethinker. Her rival was sixty-six-year-old physicist Édouard Branly, a pioneer of wireless telegraphy and a professor at the Catholic Institute of Paris. On January 23, 1911, the Academy voted to uphold its tradition of excluding women and rejected Curie's bid in favor of Branly by two votes in the decisive ballot.²⁹ Curie refused to stand for the Academy again and barred her laboratory results from being published in the Academy's proceedings for the next decade.

Later in 1911, a public scandal erupted when right-wing newspapers disclosed that between 1910 and 1911 Curie had carried on a romantic relationship with physicist Paul Langevin, a former doctoral student of Pierre Curie who was five years her junior and estranged from his wife, Jeanne. In November 1911, while Curie and Langevin were in Brussels attending the inaugural Solvay Conference alongside Albert Einstein, Max Planck, and Ernest Rutherford, Paris newspapers including Le Journal and the nationalist L'Action Française published correspondence stolen from Langevin's apartment, portraying Curie in xenophobic and antisemitic terms as a foreign homewrecker. Returning to France, she found an angry mob gathered outside her home in Sceaux and had to seek refuge in Paris with her daughters Irène and Ève in the home of mathematician Émile Borel, who risked his position as scientific director of the École Normale Supérieure to shelter her. Several duels were fought between rival journalists and defenders of Curie, including one involving Langevin himself.

Amidst the uproar, the Royal Swedish Academy of Sciences announced that it had awarded Curie the 1911 Nobel Prize in Chemistry as sole laureate, "in recognition of her services to the advancement of chemistry by the discovery of the elements radium and polonium, by the isolation of radium and the study of the nature and compounds of this remarkable element". Fearing embarrassment at the royal ceremony, Swedish chemist Svante Arrhenius wrote to Curie advising her not to attend until the allegations were cleared. Supported by encouraging letters from colleagues such as Albert Einstein, Curie replied that there was no connection between her scientific work and the slander regarding her private life, traveled to Stockholm with her sister Bronisława and daughter Irène, and accepted the prize in December 1911. Shortly after returning to France, exhausted by physical illness and emotional strain, she was hospitalized for depression and a kidney ailment requiring surgery.

Just before the outbreak of the First World War in August 1914, construction was completed on the Radium Institute (Institut du Radium) in Paris, a joint initiative of the University of Paris and the Pasteur Institute.³⁰³¹ The complex on the newly named Rue Pierre-Curie comprised two wings: the Curie Pavilion, directed by Marie Curie and dedicated to physics and chemistry research, and the Pasteur Pavilion, directed by physician Claude Regaud and dedicated to biological and medical research into cancer therapy. When German forces advanced toward Paris in September 1914, Curie packed her laboratory's sole gram of radium into a fifty-kilogram lead-lined casing, transported it by train to Bordeaux to deposit it in a bank vault for safekeeping, and returned immediately to Paris. She also attempted to donate her two gold Nobel Prize medals to the French National Bank to help finance the war effort, though the bank refused to melt them down, prompting her to invest her prize funds in war bonds instead.³²

Recognizing that battlefield surgeons desperately needed X-ray equipment close to the front lines to locate bullets, shrapnel, and bone fractures in wounded soldiers without risky transport, Curie halted her theoretical research and rapidly studied anatomy, medical radiology, and automotive mechanics.¹ Appointed director of the Red Cross Radiology Service and supported by the Union of Women of France and wealthy private donors, she requisitioned motor vehicles and converted them into mobile radiography units.³³ Known colloquially among French soldiers as petites Curies ("Little Curies"), each vehicle carried a Roentgen X-ray apparatus, a collapsible darkroom with curtains, and an electrical dynamo driven directly by the automobile's petrol engine to generate current in field hospitals lacking electricity.

Assisted by her seventeen-year-old daughter Irène, Curie personally drove and operated these units along the Western Front, including at the Marne, Ypres, and Verdun. By the end of the war, she had outfitted twenty mobile radiological vehicles and established two hundred permanent radiological installations across military hospitals in France and Belgium. At the Radium Institute, she and Irène also organized a training program that instructed 150 female volunteers to serve as X-ray technicians. Over the course of the conflict, more than one million wounded soldiers were examined by X-ray units under her program's auspices. In addition, she used radon gas ("radium emanation") extracted from her gram of radium and sealed in tiny glass tubes to sterilize infected tissue and treat scar tissue. Despite the scale of her wartime service, she received no formal recognition from the French government when hostilities ended. She documented her wartime insights in her 1919 book La Radiologie et la Guerre (Radiology in War).

After the Armistice of 1918, the Radium Institute in Paris began full operations and quickly became one of the world's four major centers for radioactivity research, alongside Ernest Rutherford's Cavendish Laboratory in Cambridge, Stefan Meyer's Institute for Radium Research in Vienna, and Otto Hahn and Lise Meitner's Kaiser Wilhelm Institute in Berlin. Yet postwar inflation and meager state funding left Curie's laboratory severely short of equipment and radioactive material; her single gram of radium was reserved almost exclusively for radon extraction for cancer therapy.

In May 1920, Curie granted a rare interview to American journalist and magazine editor Marie Mattingly Meloney (known as "Missy"). Learning that pure radium in the United States totaled roughly fifty grams while its discoverer possessed only one gram for medical use and none for pure research, Meloney organized the Marie Curie Radium Fund in America. Supported by a nationwide fundraising campaign among American women and college students, Meloney raised more than $100,000. In May and June 1921, Curie toured the United States with her daughters Irène and Ève, receiving honorary degrees from numerous universities, though Harvard University's physics department declined to grant her one, arguing she had made no major discoveries since 1906. On May 20, 1921, at the White House, President Warren G. Harding presented her with a symbolic golden key to a mahogany-and-lead casket representing one gram of radium manufactured at a plant in Pittsburgh. Before sailing, upon learning that the gift had been deeded to her personally, Curie insisted the legal documents be rewritten so the radium would pass directly to the Radium Institute rather than to her personal estate.

Her growing international stature prompted the French government to award her a state stipend prior to her American departure, and in February 1922 she was elected a member of the French Academy of Medicine in recognition of her contributions to curiethérapie (brachytherapy), becoming the first woman admitted to the body. That same year, the League of Nations appointed her to its newly formed International Committee on Intellectual Cooperation, where she served for twelve years alongside Albert Einstein, Hendrik Lorentz, and Henri Bergson, advocating for international scientific bibliography standardization and intellectual property rights for researchers. She continued traveling to raise support for science, visiting Brazil in 1926 and returning to the United States in October 1929, when President Herbert Hoover presented her with a bank draft for $50,000 to purchase a gram of radium for the newly founded Radium Institute in Warsaw, whose cornerstone she had helped lay in 1925 and which opened in May 1932 under the direction of her sister Bronisława Dłuska.

By the 1920s, Curie was suffering from severe, chronic ailments stemming from decades of unprotected handling of radioactive materials and unshielded X-ray equipment during the war. Unaware in the early decades of the lethal cumulative effects of ionizing radiation, she had carried test tubes of radium isotopes in her coat pockets and stored them in her desk drawer, admiring the faint blue-green luminescence they cast in the dark.³⁴ She developed double cataracts that nearly blinded her—requiring four covert eye surgeries between 1923 and 1930—along with chronic tinnitus, severe radiation burns and lesions on her fingers, and persistent fatigue. When fatal illnesses began appearing among radium-dial painters in the United States and among staff within her own institute in the late 1920s, she instituted strict ventilation protocols and periodic blood counts for her researchers, though she remained reluctant to acknowledge publicly that radium itself was the direct cause of her own declining health.

In the spring of 1934, after visiting Poland for the last time, Curie fell ill with a high fever and worsening exhaustion.²³ She was admitted to the Sancellemoz sanatorium in Passy, in the Haute-Savoie region of eastern France, where she died on July 4, 1934, at the age of sixty-six. Her cause of death was diagnosed as aplastic pernicious anemia, a rapid failure of the bone marrow brought on by long-term exposure to radiation. She was interred two days later beside Pierre Curie at the cemetery in Sceaux in a private ceremony attended only by family and close coworkers, with her brother Józef and sister Bronisława sprinkling a handful of Polish soil into her grave.³⁵

Marie Curie's scientific legacy reshaped twentieth-century physics, chemistry, and medicine while profoundly altering societal perceptions of women's capabilities in the sciences. At the Radium Institute in Paris, she cultivated an inclusive and collaborative research environment that trained hundreds of scientists from around the world, including at least forty-five women researchers between 1906 and 1933. Among her protégés was French physicist Marguerite Perey, who discovered the element francium in 1939 and in 1962 became the first woman elected to the French Academy of Sciences—the institution that had rejected Curie half a century earlier. Another prominent researcher in her laboratory was her daughter Irène Joliot-Curie, who along with her husband, Frédéric Joliot-Curie, discovered artificial radioactivity in 1934 and shared the 1935 Nobel Prize in Chemistry, bringing the Curie family's total to five Nobel Prizes across four laureates. Her younger daughter, Ève Curie, became a journalist, pianist, and diplomat, authoring the acclaimed 1937 biography Madame Curie, and her son-in-law Henry Richardson Labouisse Jr. accepted the 1965 Nobel Peace Prize on behalf of UNICEF.

The physical artifacts of Curie's career bear lasting witness to the intensity of the substances she isolated. Her laboratory notebooks from the late 1890s, along with her personal papers, furniture, and even her cookbooks, remain heavily contaminated with radium-226, which has a half-life of approximately 1,600 years. Housed at the Bibliothèque Nationale de France in Paris, these documents are stored in lead-lined boxes, and scholars wishing to consult them must wear protective gear and sign a liability waiver.

Numerous scientific terms, awards, and institutions honor her name and work. In 1910, the Radiology Congress in Brussels designated the "curie" (symbol Ci) as the standard unit of radioactivity, and in 1944, Glenn T. Seaborg and his collaborators named the synthetic element with atomic number 96 "curium" (Cm) in honor of Marie and Pierre Curie.³⁶ Her scientific awards during her lifetime included the Royal Society's Davy Medal (1903), the Matteucci Medal (1904), the Elliott Cresson Medal (1909), the Albert Medal (1910), and the Willard Gibbs Award (1921). Institutions bearing her name include Pierre and Marie Curie University (now part of Sorbonne University) and the Institut Curie in Paris, Maria Curie-Skłodowska University in Lublin, the Maria Skłodowska-Curie National Research Institute of Oncology in Warsaw, and the Marie Curie charity for terminal illness care in the United Kingdom.³⁷ In 1996, the European Union established the Marie Curie Actions—renamed the Marie Skłodowska-Curie Actions (MSCA) in 2014—as its flagship fellowship program supporting international mobility and training for researchers across all disciplines.³⁸

On April 20, 1995, at the direction of French President François Mitterrand and in a ceremony attended by Polish President Lech Wałęsa, the remains of Pierre and Marie Curie were transferred from the cemetery in Sceaux and enshrined in the Panthéon in Paris, inside lead-lined coffins to contain residual radiation. By that act, Marie Curie became the first woman interred in France's national mausoleum solely on the basis of her own merits. The United Nations and UNESCO declared 2011 the International Year of Chemistry to coincide with the centenary of her 1911 Nobel Prize in Chemistry.