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  • UN Charter

    UN Charter

    The Charter of the United Nations is the foundational treaty of the United Nations (UN). It establishes the purposes, governing structure, and overall framework of the UN system, including its six

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  • Malala Yousafzai

    Malala Yousafzai

    Malala Yousafzai (born 12 July 1997) is a Pakistani female education activist, and producer of film and television. She is the youngest Nobel Prize laureate in history, receiving the prize in 2014

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  • The Spring

    The Spring

    The Spring (or La Source) is a large oil painting created in 1912 by the French artist Francis Picabia. The work, both Cubist and abstract, was exhibited in Paris at the Salon d'Automne of 1912. Th

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  • Therapeutic index

    Therapeutic index

    The therapeutic index (TI; also referred to as therapeutic ratio) is a quantitative measurement of the relative safety of a drug with regard to risk of overdose. It is a comparison of the amount of

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  • Refracting telescope

    Refracting telescope

    A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope

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  • Buddhist studies

    Buddhist studies

    Buddhist studies, also known as Buddhology, is the academic study of Buddhism. The term Buddhology was coined in the early 20th century by the Unitarian minister Joseph Estlin Carpenter to mean the

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  • Wright Flyer

    Wright Flyer

    The Wright Flyer (also known as the Kitty Hawk,Flyer I or the 1903 Flyer) made the first sustained flight by a manned heavier-than-air powered and controlled aircraft on December 17, 1903. Invented

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  • Absorption coefficient

    Absorption coefficient

    The linear attenuation coefficient, attenuation coefficient, or narrow-beam attenuation coefficient characterizes how easily a volume of material can be penetrated by a beam of light, sound, partic

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  • Wright brothers

    Wright brothers

    The Wright brothers, Orville Wright (August 19, 1871 – January 30, 1948) and Wilbur Wright (April 16, 1867 – May 30, 1912), were American aviation pioneers generally credited with inventing, buildi

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  • Inverse metre

    Inverse metre

    Reciprocal length or inverse length is a quantity or measurement used in several branches of science and mathematics, defined as the reciprocal of length.Common units used for this measurement incl

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