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Camel at Khor Rori, Oman; mammal.

Do Camels Store Water in Their Humps?

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

Calendar marking march 15th

22 Questions About Time and Timekeeping Answered

Centimetres vs inches, metal rulers on a white background with clipping path.

15 Questions About Units of Measurement Answered

Bar graph of the United States Death Toll during major events. Infogram chart.

U.S. Death Toll During Major Events

Close up of periodic table, focus on nickel, copper, zinc, palladium, silver, cadmium

When Was the Periodic Table Invented?

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

colitis

pathology

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digestive system diseases

In digestive system disease: Colitis
The most common form of chronic colitis (inflammation of the colon) in the Western world, ulcerative colitis, is idiopathic (i.e., of unknown cause). Ulcerative colitis varies from a mild inflammation of the mucosa of the rectum, giving rise to excessive mucus and some spotting…
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