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Images & Videos
Gothic mirror, detail from The Marriage of Giovanni Arnolfini and Giovanna Cenami by Jan van Eyck, 1434; in the National Gallery, London. Colonial American Queen Anne furniture (Left to right) Maple and pine mirror, probably from Boston, 1720–45, above a tulip and maple tea table, Middle Colonies, 1730–40; japanned pine and maple high chest by John Pimm of Boston, 1740–50; and a walnut splat-back Queen Anne armchair; in the Henry Francis du Pont Winterthur Museum, Delaware. kaleidoscope elliptic mirror reflection of light in a mirror
How lenses and mirrors affect light and vision
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Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)
How Fast Is the Universe Expanding?
Discover
A mug shot taken by the regional Colombia control agency in Medellin
Pablo Escobar: 8 Interesting Facts About the King of Cocaine
Rural Irish landscape, Sligo, Ireland.
Why Is Ireland Two Countries?
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
Hindu Holi Festival celebrations with colored water, powder and colorful flower petals thrown over celebrants at a Hindu temple in Mathura, Uttar Pradesh, India on March 24, 2021.
Holi: Festival of Colors
Statue of Liberty in front of the skyline of Manhattan, New York City, New York.
Who Was the Woman Behind the Statue of Liberty?
Bar graph of the United States Death Toll during major events. Infogram chart.
U.S. Death Toll During Major Events
The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World

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Photos and Videos

Gothic mirror, detail from The Marriage of Giovanni Arnolfini and Giovanna Cenami by Jan van Eyck, 1434; in the National Gallery, London.
Colonial American Queen Anne furniture (Left to right) Maple and pine mirror, probably from Boston, 1720–45, above a tulip and maple tea table, Middle Colonies, 1730–40; japanned pine and maple high chest by John Pimm of Boston, 1740–50; and a walnut splat-back Queen Anne armchair; in the Henry Francis du Pont Winterthur Museum, Delaware.
kaleidoscope
elliptic mirror
reflection of light in a mirror
How lenses and mirrors affect light and vision
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Key People

Amici, Giovanni Battista
Giovanni Battista Amici
Italian astronomer
James Short
British optician and astronomer