Ainissa Ramirez—North, South, East, and Gladys West: How a Mathematician Helped Shape GPS
Young readers have probably already experienced the wonders of GPS. But they may not yet know about a woman named Gladys West, who helped the satellite system become what it is today. West, a Black woman, did calculations that showed scientists Earth's true shape and so shows us our way around the planet today. Thanks to North, South, East, and Gladys West, she is no longer a hidden figure.