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Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.

6 Animals We Ate Into Extinction

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

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

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

What is J.P. Morgan’s legacy?

Written and fact-checked by The Editors of Encyclopaedia Britannica

J.P. Morgan cofounded (1871) the banking company Drexel, Morgan and Company. It became J.P. Morgan and Company in 1895 and is now JPMorgan Chase & Co. In addition, it was the centrality of his role in averting disaster in 1907 that led the U.S. government to create the Federal Reserve System.