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  1. Rock - Structure, Texture, Composition | Britannica

    Jul 7, 2025 · Rock - Structure, Texture, Composition: Physical properties of rocks are of interest and utility in many fields of work, including geology, petrophysics, geophysics, materials …

  2. 27 Club | List, Members, Deaths, Curse, History, Famous People ...

    Jul 7, 2025 · The 27 Club is a list of musicians and celebrities who died at age 27. Jimi Hendrix, Brian Jones, Janis Joplin, Kurt Cobain, and Amy Winehouse are notable members of the 27 …

  3. List of presidents of the United States | U.S. Presidents, Presidential ...

    As the head of the government of the United States, the president is arguably the most powerful government official in the world. The president is elected to a four-year term via an electoral …

  4. Demographics | Population, Age, Gender | Britannica

    Demographics, the particular characteristics of a large population over a specific time interval. The word is derived from the Greek words for “people” (demos) and “picture” (graphy). Examples …

  5. Karoline Leavitt | Education, Age, Trump’s Press Secretary, & Facts ...

    Jul 21, 2025 · Karoline Leavitt is an American government official who serves as White House press secretary (2025– ) in the Republican administration of Pres. Donald Trump; she is the …

  6. Standing Rock protests | Summary, Violence, & Outcome | Britannica

    The Standing Rock protests were a campaign undertaken in North Dakota in 2016 and 2017 to halt the construction of the Dakota Access pipeline. Early resistance to the pipeline was …

  7. Encyclopedia Britannica | Britannica

    Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.

  8. 123Movies | History, Shutdown, & Facts | Britannica

    123Movies is a defunct movie and television show streaming website that enabled users to watch and download media for free in the 2010s.

  9. Rock and roll | History, Songs, Artists, & Facts | Britannica

    Rock and roll, style of popular music that originated in the United States in the mid-1950s and that evolved by the mid-1960s into the more encompassing international style known as rock …

  10. How Long Did Dinosaurs Live? | Extinct, Time Span, & Facts

    Jul 22, 2025 · Dinosaurs roamed the Earth for an impressive span of about 165 to 180 million years. They perished in a mass extinction event about 66 million years ago.