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New York City skyline
Chrysler Building (center, with pointed spire), 1932

Art Deco architecture in New York City flourished during the 1920s and 1930s, and is found in governmental, residential, and commercial buildings, from towering skyscrapers to modest middle-class housing and municipal buildings, across all five boroughs. The style broke with traditional architectural conventions and was characterized by verticality, ornamentation, and new building materials. It was influenced by worldwide decorative arts trends, the rise of mechanization, and New York City's 1916 Zoning Resolution, which favored the setback feature in many buildings. The Great Depression and changing tastes pushed the style to more subdued applications as it spread in the 1930s, before falling out of fashion after World War II. Among New York's most recognizable skyscrapers are the Chrysler Building (pictured) and the Empire State Building, both Art Deco skyscrapers. Many of these buildings are protected by historic preservation laws, while others have been lost to new development or neglect. (Full article...)

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Planocarina marginata, a hyalospheniid amoeba
Planocarina marginata, a hyalospheniid amoeba

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November 27: Guru Nanak Gurpurab (Sikhism, 2023)

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Map of Mexico with Campeche highlighted
Map of Mexico with Campeche highlighted

There are 13 municipalities in Campeche, a state on the Yucatán Peninsula in Mexico. According to the 2020 Mexican census, Campeche is the third least populous state with 928,363 inhabitants and the 17th largest by land area spanning 57,693.59 square kilometres (22,275.62 sq mi). The largest municipality by population in Campeche is the state capital Campeche, with 294,077 residents, while the smallest municipality by population is Palizada with 8,683 residents. The largest municipality by area is Calakmul, which spans 14,031.51 km2 (5,417.60 sq mi), while Tenabo is the smallest at 1,061.63 km2 (409.90 sq mi). The first municipalities to incorporate were Campeche, Carmen, and Hecelchakán on April 6, 1825, and the newest municipalities are Dzitbalché and Seybaplaya, which incorporated January 1, 2021. (Full list...)

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Aragonite

Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (CaCO3), the others being calcite and vaterite. It is commonly found in Spain, with some deposits also occurring in France, Slovakia and the United States. Aragonite is formed by biological processes, including precipitation from marine and freshwater environments. It is used in aquaria as a means of replicating reef conditions, and as an agent in the removal of pollutants such as zinc, cobalt and lead from contaminated wastewater. This aragonite specimen, measuring 4 by 3.6 by 3.5 centimetres (1.6 in × 1.4 in × 1.4 in), was mined in Los Molinillos in Cuenca, Spain.

Photograph credit: JJ Harrison

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