Every so often, the night’s sky will give way to something unfamiliar. A light that glows differently from its neighboring stars, or an object that moves unlike any airplane you’ve seen before.

The U.S. Coast Survey map calculated the number of slaves in each county in the United States in 1860. Library of Congress In September of 1861, the U.S. Coast Survey published a large map, ...

The Vault is Slate’s history blog. Like us on Facebook, follow us on Twitter @slatevault, and find us on Tumblr. Find out more about what this space is all about here. This 1936 pictorial map of ...

Maps are an important tool for learning about the world around you. Some maps are designed to show what roads will take you where, and others are designed to tell you about the actual land in a given ...

The Vault is Slate’s history blog. Like us on Facebook, follow us on Twitter @slatevault, and find us on Tumblr. Find out more about what this space is all about here. This map prefaced a 1918 book by ...

In a new national EdWeek Research Center survey, 65 percent of the 401 participating teachers said their state does not require students to learn Black history. While educators and researchers point ...

Less than a month after the September 11 terrorist attacks on the United States, U.S. troops—with support from British, Canadian, French, German and Australian forces—invaded Afghanistan to fight Al ...