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Fidel Castro was a revolutionary Cuban leader who reigned over Cuba as a charismatic, yet contentious, figure from 1959-2008.

Florence Nightingale was a pioneer in modern nursing, recognized for her heroic service during the Crimean War.

Lou Hoover was the 31st First Lady of the United States, known for her activism and contributions to education and women's rights.

Emil von Behring was a German physician and Nobel laureate who developed the first antitoxin for diphtheria, revolutionizing modern medicine.

Margaret Sanger was an American birth control activist, sex educator, and nurse who founded the Planned Parenthood Federation of America.

Alan L. Hart was a pioneering radiologist, tuberculosis researcher, and one of the first transgender men to undergo gender affirmation surgery in the United States.

Harvey Wiley was an American chemist and pioneering crusader for pure food and drug laws, instrumental in passing the 1906 Pure Food and Drug Act.

Ancel Keys was an American physiologist and nutritionist, whose influential research shaped modern understanding of the relationship between diet and heart disease.

Henry J. Kaiser was an American industrialist and entrepreneur, who revolutionized construction, shipbuilding, and healthcare industries, leaving a lasting impact on modern America.

Charles Richard Drew was a pioneering African American physician, surgeon, and medical researcher who revolutionized blood transfusion and storage techniques, saving countless lives.

Jonas Salk was an American medical researcher and virologist who developed the first safe and effective polio vaccine, transforming global public health.

Edward Jenner was an English physician and scientist who pioneered the smallpox vaccine, revolutionizing public health and saving countless lives.