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References

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Martin Luther King, Jr.

Why We Celebrate MLK Day

Panoramic view at sunrise of moai, Ahu Tongariki, Easter Island (Rapa Nui), Chile

6 Lost Civilizations

World Data Locator Map: Australia

Is Australia an Island?

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

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

Panoramic view of moai, Ahu Tongariki, Easter Island (Rapa Nui), Chile

8 of the World’s Most-Remote Islands

Apollo 12 astronaut Charles "Pete" Conrad stands beside the U.S. flag after is was unfurled on the lunar surface during the first extravehicular activity (EVA-1) Nov. 19, 1969. Footprints made by the crew can be seen in the photograph.

How Many People Have Been to the Moon?

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time perception

Learn about this topic in these articles:

theory of Bergson

In Henri Bergson: Early years
The first result of this change was his Essai…
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