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African American History
Hamilton Naki became a self-taught surgeon of such skill that Dr. Christiaan Barnard chose him to assist in the world's first human heart transplant in 1967. His contribution was kept secret for three decades because he was a black man in apartheid-era South Africa. He acquired his surgical skills through years of silent observation and covert practice at the university's medical school. His skills were so esteemed that the university quietly looked the other way.
History has credited Thomas Edison with the invention of the light bulb, but fewer people know about Lewis Latimer‘s innovations toward its development. Until Latimer’s process for making carbon filament, Edison’s light bulbs would only burn for a few minutes. Latimer’s filament burned for several hours.