Most people use GPS without knowing that some of its accuracy rests on the work of a brilliant Black mathematician named Dr. Gladys West. Her calculations helped scientists develop a more precise model of Earth, laying essential groundwork for the satellite technology that guides phones, airplanes, ships and emergency responders today. She did not invent GPS alone, but the system millions depend on would not be the same without her contribution. #BlackHistory #GladysWest #WomenInSTEM #LataraSpeaksTruth