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They are more commonly known as horseshoe crabs (a name applied more specifically to the only extant family, Limulidae). They first appeared in the Hirnantian ( Late Ordovician ). Currently, there are only four living species.
Free-air gravity anomaly over the Chicxulub structure (coastline and state boundaries shown as black lines). The Chicxulub crater (IPA: [t͡ʃikʃuˈlub] ⓘ cheek-shoo-LOOB) is an impact crater buried underneath the Yucatán Peninsula in Mexico.
A 1 km 2 (0.39 sq mi) parcel of land in neighbouring Hengqin island that hosts the University of Macau also falls under the regional government's jurisdiction. [104] The territory's highest point is Coloane Alto, 170.6 m (560 ft) above sea level. [100] Urban development is concentrated on peninsular Macau, where most of the population lives. [105]
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions.It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on the definition, to Antarctica) in the south, and is bounded by the continents of Asia and Australia in the west and the Americas in the east.
A map of the Philippines showing the island groups of Luzon, the Visayas, and Mindanao. As an archipelago, the Philippines comprises about 7,641 islands [1] [2] clustered into three major island groups: Luzon, the Visayas, and Mindanao.
Since the end of the Cold War, NATO has added 16 more members from 1999 to 2024. [1] Article 5 of the treaty states that if an armed attack occurs against one of the member states, it shall be considered an attack against all members , and other members shall assist the attacked member, with armed forces if necessary. [ 2 ]
A speculative representation of Antarctica labelled as ' Terra Australis Incognita ' on Jan Janssonius's Zeekaart van het Zuidpoolgebied (1657), Het Scheepvaartmuseum The name given to the continent originates from the word antarctic, which comes from Middle French antartique or antarctique ('opposite to the Arctic') and, in turn, the Latin antarcticus ('opposite to the north').
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 December 2024. Composite statistic of life expectancy, education, and income indices "HDI" redirects here. For other uses, see HDI (disambiguation). For the complete ranking of countries, see List of countries by Human Development Index. World map of countries and territories by HDI scores in ...