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  • Umayyad Empire

    Umayyad Empire

    The Umayyad Caliphate or Umayyad Empire (UK: /uː ˈ m aɪ j æ d / ,US: /uː ˈ m aɪ æ d / ;Arabic: ٱلْخِلَافَة ٱلْأُمَوِيَّة , romanized: al-Khilāfa al-Umawiyya ) was the second caliphate established a

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  • Terrestrial time

    Terrestrial time

    Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of E

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  • Kreis Riga

    Kreis Riga

    Riga county (Latvian: Rīgas apriņķis, German: Kreis Riga, Russian: Рижскій уѣздъ , romanized: Rizhskiy uyezd ) was a historic county of the Duchy of Livonia, the Governorate of Livonia, and the Rep

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  • Tuvaluan language

    Tuvaluan language

    Tuvaluan (/ˌ t uː v ə ˈ l uː ə n / ), often called Tuvalu, is a Polynesian language closely related to the Ellicean group spoken in Tuvalu. It is more or less distantly related to all other Polynes

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  • Water masses

    Water masses

    An oceanographic water mass is an identifiable body of water with a common formation history which has physical properties distinct from surrounding water. Properties include temperature, salinity,

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  • Cerulean flycatcher

    Cerulean flycatcher

    The cerulean flycatcher (Eutrichomyias rowleyi) is a medium-sized (up to 18 cm long), blue passerine with bright cerulean blue plumage, a bare white orbital ring, dark brown iris, bluish black bill

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  • Polynesian peoples

    Polynesian peoples

    Polynesians are an ethnolinguistic group comprising closely related ethnic groups native to Polynesia, which encompasses the islands within the Polynesian Triangle in the Pacific Ocean. They trace

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  • Temperature–salinity diagram

    Temperature–salinity diagram

    In oceanography, temperature-salinity diagrams, sometimes called T-S diagrams, are used to identify water masses. In a T-S diagram, rather than plotting each water property as a separate "profile,"

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  • Puerto Vallarta

    Puerto Vallarta

    Puerto Vallarta (Spanish pronunciation: [ˈpweɾto βaˈʎaɾta] or simply Vallarta) is a Mexican resort city near the Bahía de Banderas on the Pacific coast of the Mexican state of Jalisco. Puerto Valla

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  • Gunung Awu

    Gunung Awu

    Mount Awu (Indonesian: Gunung Awu) is the largest stratovolcano in the Sangihe Islands chain, located on Sangir Island in North Sulawesi, Indonesia. Powerful eruptions have occurred in 1711, 1812,

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