Print Version
How to print: Click "Print Cards" and set paper size to US Letter, margins to 0.4in, and enable Background graphics (or "Print backgrounds"). Print Page 1 (fronts) on card stock, then refeed the paper and print Page 2 (backs). For double-sided alignment, flip the paper along the long edge (top-to-bottom). Cut along dashed lines.
Page 1 — Card Fronts
Norman Borlaug
Saved a Billion Lives
Henrietta Lacks
Her Cells Changed the World
Maurice Hilleman
40+ Vaccines · 8M Lives/Year
Irena Sendler
Saved 2,500 Children
Ignaz Semmelweis
Wash Your Hands
Claudette Colvin
9 Months Before Rosa Parks
Garrett Morgan
Traffic Signal & Gas Mask
Lois Gibbs
Created the Superfund
Marjory Stoneman Douglas
River of Grass
Abraham Wald
Survivorship Bias
Page 2 — Card Backs
Norman Borlaug
The Man Who Saved a Billion Lives
Led the Green Revolution, developing high-yield, disease-resistant wheat varieties that transformed agriculture in Mexico, India, and Pakistan, preventing mass famine in the post-war world.
Legacy
Credited with saving over one billion people from starvation. One of only seven people in history to win the Nobel Peace Prize, the Presidential Medal of Freedom, and the Congressional Gold Medal.
Henrietta Lacks
The Mother of Modern Medicine
A young mother from Baltimore whose cancer cells were taken without her knowledge or consent in 1951. Those cells—named HeLa—became the first immortal human cell line, reproducing endlessly in laboratories.
Legacy
HeLa cells enabled the polio vaccine, cancer treatments, IVF, gene mapping, and COVID-19 research. She never knew her contribution, and her family was not told for 22 years.
Maurice Hilleman
The Vaccine Pioneer
A microbiologist who developed over 40 vaccines, including measles, mumps, hepatitis A and B, meningitis, and pneumonia. He often worked alone and even tested vaccines on his own daughters.
Legacy
His vaccines are estimated to save approximately 8 million lives every single year. He may be the most impactful medical scientist of the 20th century—yet remains largely unknown to the public.
Irena Sendler
The Angel of the Warsaw Ghetto
A Polish social worker who smuggled approximately 2,500 Jewish children out of the Warsaw Ghetto during WWII, hiding them in suitcases, toolboxes, and even under ambulances.
Legacy
She buried lists of the children's real names in jars under an apple tree, hoping to reunite them with their families. Tortured by the Gestapo, she never revealed a single name. Nominated for the Nobel Peace Prize, she lost to Al Gore.
Ignaz Semmelweis
The Savior of Mothers
A Hungarian doctor who discovered in 1847 that doctors washing their hands with chlorinated lime solutions drastically reduced maternal mortality from childbed fever—from 18% to under 2%.
Legacy
The medical establishment rejected and mocked his findings. He was committed to an asylum, where he died from a beating at age 47. Two decades later, germ theory proved him completely right.
Claudette Colvin
The First to Sit Down
At 15 years old, she refused to give up her bus seat to a white passenger in Montgomery, Alabama—nine months before Rosa Parks. She was arrested and later became a plaintiff in Browder v. Gayle, the Supreme Court case that ended bus segregation.
Legacy
Civil rights leaders chose Rosa Parks as the public face of the boycott, and Colvin was largely written out of the story she helped ignite. She later said, "I feel proud of what I did."
Garrett Morgan
The Signal and the Mask
A Black inventor and entrepreneur who patented the three-position traffic signal and a safety hood (early gas mask) that saved lives in tunnel disasters. He also invented a hair-straightening product and a self-extinguishing cigarette.
Legacy
As a Black inventor in early-1900s America, he often hired white actors to demonstrate his inventions to avoid being ignored. His gas mask was used to rescue workers in the 1916 Lake Erie tunnel explosion.
Lois Gibbs
The Mother of Love Canal
A young mother in Niagara Falls who discovered her neighborhood, Love Canal, was built on a 21,000-ton toxic chemical dump. Her children and neighbors were getting sick. She organized her community and took on the government and Hooker Chemical.
Legacy
Her activism forced the creation of the federal Superfund program, which has identified and cleaned up thousands of toxic sites across America. She proved that one determined parent can change national policy.
Marjory Stoneman Douglas
The Defender of the Everglades
A journalist who became the fiercest defender of the Florida Everglades. At 57, she published "The Everglades: River of Grass," transforming public perception of the wetland from a worthless swamp to a national treasure.
Legacy
She fought to protect the Everglades past her 100th birthday, often telling politicians exactly what she thought. She received the Presidential Medal of Freedom at age 103.
Abraham Wald
The Man Who Saw the Missing
A statistician who solved a WWII puzzle: the military wanted to armor planes where returning aircraft had bullet holes. Wald realized the holes showed where planes survived—armor the spots with no holes, because planes hit there never came back.
Legacy
His insight saved countless Allied lives and founded the field of sequential analysis. His "survivorship bias" lesson remains one of the most important ideas in statistics and decision-making today.