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Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Law legal system crime concept with gavel and scales of justice with books in the background. (mallet, judicial system).

What Are the Differences Between First-, Second-, and Third-Degree Murder?

The Battle of New Orleans, by E. Percy Moran, c. 1910. Andrew Jackson, War of 1812.

26 Decade-Defining Events in U.S. History

Young boys working in a thread spinning mill in Macon, Georgia, 1909. Boys are so small they have to climb onto the spinning frame to reach and fix broken threads and put back empty bobbins. Child labor. Industrial revolution

The Rise of the Machines: Pros and Cons of the Industrial Revolution

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland

The Largest Islands in the World

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

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Archimedes screw screw thread cap screw machine screw wood screw setscrew self-tapping screw power screw lag screw screw fastener spring wheel and axle flywheel brake lever bearing clutch shaft coupling governor pulley

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William Sellers

American engineer and manufacturer