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  1. 1989 Tiananmen Square protests and massacre. /  39.90333°N 116.39167°E  / 39.90333; 116.39167. The Tiananmen Square protests, known in China as the June Fourth Incident, [1] [2] [a] were student-led demonstrations held in Tiananmen Square, Beijing, China, lasting from 15 April to 4 June 1989. After weeks of unsuccessful attempts between ...

  2. Stainless steel, also known as inox, corrosion-resistant steel ( CRES) and rustless steel, is an alloy of iron that is resistant to rusting and corrosion. It contains iron with chromium and other elements such as molybdenum, carbon, nickel and nitrogen depending on its specific use and cost. Stainless steel's resistance to corrosion results ...

  3. International Workers' Day, also known as Labour Day in some countries[1] and often referred to as May Day,[2][3] is a celebration of labourers and the working classes that is promoted by the international labour movement and occurs every year on 1 May,[4][5] or the first Monday in May.[6][7] Traditionally, 1 May is the date of the European ...

    • Dimensions
    • Discovery
    • Underground River and Cave
    • Flora and Fauna

    The Xiaozhai Tiankeng is 626 meters (2,054 feet) long, 537 meters (1,762 feet) wide, and between 511 and 662 meters (1,677 and 2,172 ft) deep, with vertical walls. Its volume is 119,349,000 m³ and the area of its opening is 274,000 m2. This material has been dissolved and carried away by the river. The sinkhole is a doubly nested structure—the uppe...

    The Xiaozhai Tiankeng has been well known to local people since ancient times. Xiaozhai is the name of an abandoned village nearby and literally means "little village", and "Tiankeng" means Heavenly Pit, a unique regional name for sinkholes in China. A 2,800-step staircase has been constructed in order to facilitate tourism.

    The Tiankeng formed over the Difeng cave, which in turn had been formed by a powerful underground river which still flows underneath the sinkhole. The underground riverstarts in the Tianjin fissure gorge and reaches a vertical cliff above the Mekong River, forming a 46-metre-high (151-foot) waterfall. The length of this underground river is approxi...

    1,285 species of plants, including the ginkgo, and many rare animals like the clouded leopard and the Chinese Giant Salamanderhave been found in the sinkhole.

  4. ST Aerospace A-4SU Super Skyhawk. The Douglas A-4 Skyhawk is a single-seat subsonic carrier-capable light attack aircraft designed and produced by the American aerospace manufacturer Douglas Aircraft Company, and later, McDonnell Douglas. It was originally designated A4D under the United States Navy 's pre-1962 designation system .

  5. Marcia Lewis. Monica Samille Lewinsky (born July 23, 1973) [1] is an American activist. Lewinsky became internationally known in the late 1990s after U.S. President Bill Clinton admitted to having had an affair with her during her days as a White House intern between 1995 and 1997. The affair and its repercussions (which included Clinton's ...

  6. The attack on Pearl Harbor [nb 3] was a surprise military strike by the Imperial Japanese Navy Air Service on the American naval base at Pearl Harbor in Honolulu, Hawaii, in the United States, just before 8:00 a.m. (local time) on Sunday, December 7, 1941. At the time, the United States was a neutral country in the World War II conflict.

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