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bunch of numbers

Unusual Counting Systems

number zero, 0 balloon

Is Zero an Even or an Odd Number?

Discover

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

U.S. Death Toll During Major Events

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

Moonrise over Tucson, Arizona

Why Doesn’t Arizona Observe Daylight Saving Time?

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Franklin D. Roosevelt, who formulated the Four Freedoms.

7 Alphabet Soup Agencies that Stuck Around

airplane in flight (plane, aircraft, flying)

7 Puzzling Plane Disappearances

ratio: Related Content

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difference quotient aspect ratio golden ratio cross ratio mass-to-charge ratio proportionality fraction mathematics algorithm foundations of mathematics probability and statistics numerals and numeral systems matrix function fractal graph derivative vector

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barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure

Fun Facts of Measurement & Math

barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure

Fun Facts of Measurement & Math