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  1. en.wikipedia.org › wiki › LimestoneLimestone - Wikipedia

    Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place ...

  2. Free-air gravity anomaly over the Chicxulub structure (coastline and state boundaries shown as black lines) The Chicxulub crater ( IPA: [t͡ʃikʃuˈluɓ] ⓘ cheek-shoo-LOOB) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo. [3]

  3. Göbekli Tepe (Turkish: [ɟœbecˈli teˈpe],[2] 'Potbelly Hill';[3] Kurdish: Girê Mirazan or Xirabreşkê, 'Wish Hill'[4]) is a Neolithic archaeological site in the Southeastern Anatolia Region of Turkey. The settlement was inhabited from c. 9500 to at least 8000 BCE,[5] during the Pre-Pottery Neolithic. It is famous for its large circular ...

  4. en.wikipedia.org › wiki › Sputnik_1Sputnik 1 - Wikipedia

    Sputnik 1. Sputnik 1 ( / ˈspʌtnɪk, ˈspʊtnɪk /, Russian: Спутник-1, Satellite 1) was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program. It sent a radio signal back to Earth for three weeks before its three silver-zinc ...

  5. en.wikipedia.org › wiki › AsbestosAsbestos - Wikipedia

    Asbestos (/ æ s ˈ b ɛ s t ə s, æ z-,-t ɒ s / ass-BES-təs, az-, - toss) is a naturally occurring fibrous silicate mineral.There are six types, all of which are composed of long and thin fibrous crystals, each fibre (particulate with length substantially greater than width) being composed of many microscopic "fibrils" that can be released into the atmosphere by abrasion and other processes.

  6. Jeremy Charles Robert Clarkson (born 11 April 1960) is an English television presenter, journalist, and writer who specialises in motoring. He is best known for the motoring programmes Top Gear and The Grand Tour alongside Richard Hammond and James May. He also currently writes weekly columns for The Sunday Times and The Sun. Clarkson hosts ...

  7. Steve Austin (born Steven James Anderson; December 18, 1964), better known by his ring name " Stone Cold " Steve Austin, is an American retired professional wrestler, media personality and actor. Widely regarded as one of the greatest professional wrestlers of all time, he was integral to the development and success of the World Wrestling ...

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