Valerie Thomas, in full Valerie LaVerne Thomas, (born February 8, 1943, Baltimore, Maryland, U.S.), American scientist and inventor who, while working at the National Aeronautics and Space Administration (NASA), invented a way to transmit three-dimensional images, or holograms, that appear to be real. In addition, she helped to develop processing software to convert scientific data captured by satellites into information that scientists could use. From an early age, Thomas was interested in electronics, mathematics, and physics despite the fact that girls were not encouraged to study those subjects. Moreover, because she was an African American in a racially segregated society,