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

7 of History's Most Notorious Serial Killers

Gills of three old specimens of webcap fungus (Cortinarius) in Gloucestershire, South West England. toxic, fungi, poisonous mushroom

7 of the World’s Most Poisonous Mushrooms

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

World Data Locator Map: Australia

Is Australia an Island?

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

Korean War - U.S. Marines watch explosions of bombs dropped by Marine Vought F4U Corsair fighter bomber planes during the Battle of Chosin Reservoir, Korea, in December 1950. soldiers

Korean War Timeline

ash test

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grade of flour

In cereal processing: Grade
…placed on use of the ash test to determine grade. Bakers will generally pay higher prices for pure flour of low ash content, as the flour is brighter and lighter in colour. Darker flours may have ash content of 0.7 to 0.8 percent or higher.
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