1918: Katherine Johnson is born

On 26 August 1918, Katherine Coleman Goble Johnson was born in White Sulphur Springs, West Virginia. A mathematician of extraordinary precision, she became one of NASA’s most trusted “human computers,” calculating trajectories by hand for the earliest crewed American spaceflights—including Alan Shepard’s 1961 flight, John Glenn’s orbital mission, and the Apollo lunar landings.

Long before electronic machines took over, complex scientific work depended on teams of skilled human computers, many of them women. Johnson’s gift for analytic geometry and her insistence on verifying every figure earned her the right to sit in meetings previously closed to women and to African Americans. When digital computers finally arrived at Langley, Glenn famously refused to fly until Johnson herself had checked the machine’s output.

Her career sits at a quiet hinge in the intellectual history that produced artificial intelligence. The same drive to automate laborious calculation that once filled rooms with human computers also propelled the design of electronic stored-program machines. Numerical methods, orbital mechanics, and error-checking routines refined by people like Johnson became core techniques later absorbed into computer science and, eventually, into machine-learning systems that now perform millions of similar calculations per second.

Today’s AI models that guide autonomous spacecraft, optimize launch windows, or simulate planetary entry descend directly from the mathematical culture she embodied. Johnson’s legacy reminds us that every leap in machine intelligence rests on earlier human intelligence—patient, exacting, and indispensable.