magnacycle

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Camel at Khor Rori, Oman; mammal.

Do Camels Store Water in Their Humps?

Space race (1957-1969) infographic between United States (U.S.) and Russia. America, Soviet Union, U.S.S.R., space exploration

Timeline of the Space Race, 1957–69

Solar eclipse of the sun.

The Sun Was Eaten: 6 Ways Cultures Have Explained Eclipses

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

What Is the “Ides” of March?

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

New Seven Wonders of the World

Moonrise over Tucson, Arizona

Why Doesn’t Arizona Observe Daylight Saving Time?

magnacycle

geology

Learn about this topic in these articles:

cyclothems

In cyclothem
…have been referred to as magnacycles. These larger units are of doubtful validity and restricted utility.
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