In 1777, during the American Revolutionary War, 16-year-old Sybil Ludington, the daughter of a militia commander in Dutchess County, New York, rode her horse into the night to alert her father’s men ...

In 1543, Nicolaus Copernicus published his groundbreaking theory, “On the Revolutions of Heavenly Spheres.” His new ideas sparked a revolution by placing the Sun – rather than the Earth – at the ...

Nicolaus Copernicus published his groundbreaking theory, On the Revolutions of Heavenly Spheres. His new ideas sparked a ...