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A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

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

7 of History's Most Notorious Serial Killers

Prisoners of Buchenwald concentration camp, near Weimar, Germany, April 16, 1945, liberated by American troops of the 80th Division. Elie Wiesel (7th from the left on the middle bunk next to the vertical post) World War II Holocaust

What Is the Origin of the Term Holocaust?

Adolf Hitler (Nazi, nazism, German leader).

9 Things You Might Not Know About Adolf Hitler

Flamingo. (flamingos, birds)

Why Are Flamingos Pink?

An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.

11 Egyptian Gods and Goddesses

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

ethyl

chemistry

Learn about this topic in these articles:

unstable radicals

In radical
…as the methyl (·CH₃) and ethyl (·C₂H₅) radicals, are capable of only the most fleeting independent existence.
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