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  2. Gamma-ray burst - Wikipedia

    en.wikipedia.org/wiki/Gamma-ray_burst

    Events with a duration of less than about two seconds are classified as short gamma-ray bursts. These account for about 30% of gamma-ray bursts, but until 2005, no afterglow had been successfully detected from any short event and little was known about their origins. [67]

  3. History of ExxonMobil - Wikipedia

    en.wikipedia.org/wiki/History_of_ExxonMobil

    ExxonMobil, an American multinational oil and gas corporation presently based out of Texas, has had one of the longest histories of any company in its industry.A direct descendant of John D. Rockefeller's Standard Oil, the company traces its roots as far back as 1866 to the founding of the Vacuum Oil Company, which would become part of ExxonMobil through its own merger with Mobil during the 1930s.

  4. Alibaba Group - Wikipedia

    en.wikipedia.org/wiki/Alibaba_Group

    In 2017, Alibaba started opening a chain of supermarkets, named Freshippo (or Hema; 盒马), as part of the company's "new retail strategy," where customers can either order in the store or online for delivery in under 30 minutes. It offers a mobile app that recommends customers products based on data analytics. [107]

  5. Lindsey Graham - Wikipedia

    en.wikipedia.org/wiki/Lindsey_Graham

    Lindsey Olin Graham (/ ɡ r æ m /; born July 9, 1955) is an American lawyer and politician serving as the senior United States senator from South Carolina, a seat he has held since 2003.

  6. Mountaintop removal mining - Wikipedia

    en.wikipedia.org/wiki/Mountaintop_removal_mining

    Mayflies (Order Ephemeroptera) are abundant in streams in the Appalachian Mountain region. They are highly sensitive to water quality, as their immature forms require unpolluted water. VF and AMD are the leading causes of water chemistry and habitat alterations in this region, the driving factors limiting mayfly populations.

  7. Big Bang - Wikipedia

    en.wikipedia.org/wiki/Big_Bang

    The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] The notion of an expanding universe was first scientifically originated by physicist Alexander Friedmann in 1922 with the mathematical derivation of the Friedmann equations.

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