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Imaging from NASA's Shuttle Radar Topography Mission STS-99 reveals part of the diameter ring of the crater in the form of a shallow circular trough. Numerous cenotes (sinkholes) cluster around the trough marking the inner crater rim.
The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán Peninsula during the late 1970s. Penfield was initially unable to obtain evidence that the geological feature was a crater and gave up his search. Later, through contact with Alan R. Hildebrand in 1990, Penfield obtained samples that suggested it was an impact feature. Evidence for the crater's impact origin includes shocked quartz, a gravity anomaly, and tektites in surrounding areas. (Full article...)
The 1985 Mexico City earthquake struck in the early morning of 19 September at 07:17:50 (CST) with a moment magnitude of 8.0 and a maximal Mercalli intensity of IX (Violent). The event caused serious damage to the Greater Mexico City area and the deaths of at least 5,000 people. The sequence of events included a foreshock of magnitude 5.2 that occurred the prior May, the main shock on 19 September, and two large aftershocks. The first of these occurred on 20 September with a magnitude of 7.5 and the second occurred seven months later on 30 April 1986 with a magnitude of 7.0. They were located off the coast along the Middle America Trench, more than 350 kilometres (220 mi) away, but the city suffered major damage due to its large magnitude and the ancient lake bed on which Mexico City sits. The event caused between three and five billion USD in damage as 412 buildings collapsed and another 3,124 were seriously damaged in the city.
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Unomásuno (English: One Plus One) is a Mexican daily tabloid newspaper circulated in Mexico City. Formed in 1977 by former employees of Mexico City's daily newspaper Excélsior, it became one of the leading leftist newspapers in Mexico during the late 1970s and early 1980s. The newspaper covered investigative topics that were often avoided by the rest of the Mexican press at the time, and it was a harsh critic of the Mexican government. By the mid-1980s, disagreements over the newspaper's management style led to internal divisions. Those who disagreed with Unomásuno and its future initiatives left in 1984 and formed La Jornada, another leftist daily in Mexico City.
In the late 1980s, Unomásuno was a victim of a backlash from the Mexican government for publishing articles highlighting a growing opposition faction within Mexico's dominant political party, the Institutional Revolutionary Party (PRI). Its founder was threatened with prison for tax evasion, and the newspaper was forced to pay hefty fines. In 1989, its founder sold the newspaper to a PRI-affiliated businessman. Under the new ownership, Unomásuno became a propaganda organ for the PRI and published articles criticizing leftist opposition groups. Its circulation declined drastically over the years, and although Unomásuno was resold in 1998, it continued to experience financial difficulties. (Full article...)
A professor at the Colegio de San Nicolás Obispo in Valladolid, Hidalgo was influenced by Enlightenment ideas, which contributed to his ouster in 1792. He served in a church in Colima and then in Dolores. After his arrival, he was shocked by the rich soil he had found. He tried to help the poor by showing them how to grow olives and grapes, but in New Spain (modern Mexico) growing these crops was discouraged or prohibited by colonial authorities to prevent competition with imports from Spain. On 16 September 1810 he gave the Cry of Dolores, a speech calling upon the people to protect the interest of their King Ferdinand VII, held captive during the Peninsular War, by revolting against the European-born Spaniards who had overthrown the Spanish Viceroy José de Iturrigaray. (Full article...)
Image 17Battle of Centla, the first time a horse was used in battle in a war in the Americas. Mural in the Palacio Municipal of Paraíso, Tabasco (from History of Mexico)
Image 18A map of Mexico 1845 after Texas annexation by the U.S. (from History of Mexico)
Image 69President Obregón. Note that he lost his right arm in the Battle of Celaya (1915), earning him the nickname of Manco de Celaya ("the one-armed man of Celaya"). (from History of Mexico)
Mexico portal 1 Jews and Romani originate in the Middle East and South Asia respectively, with most arriving to Mexico via Europe · 2 Primarily arrived via Canada · 3 Originated in what is now the United States