When you think of Little House on the Prairie, you likely remember Laura, Mary, Pa and Ma—along with Laura’s younger sisters, Carrie and Grace. While Carrie Ingalls had a slightly smaller role than ...

Beulah Louise Henry was just nine years old when she came up with her first invention in 1896, a device that allowed a man to tip his hat without ever putting down his newspaper. By her death in 1973, ...