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  • 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
  • Britannica Kids
    Britannica’s new platform provides content designed and written specifically for early learners Creating a more engaging and fun learning experience for students, the activities in Britannica Fundamentals align with the content areas children learn in the classroom From language and literacy to geography and mathematics, Britannica Fundamentals supports classroom curriculum while also
  • On This Day - What Happened Today In History | Britannica
    On This Day In History: anniversaries, birthdays, major events, and time capsules This day's facts in the arts, politics, and sciences
  • Cotton gin | Definition, Inventor, Eli Whitney, Impact, Facts . . .
    cotton gin, machine for cleaning cotton of its seeds, invented in the United States by Eli Whitney in 1793 The cotton gin is an example of an invention directly called forth by an immediate demand; the mechanization of spinning in England had created a greatly expanded market for American cotton, whose production was inhibited by the slowness of manual removal of the seeds from the raw fiber
  • Sex | Definition, Origin, Significance, Facts | Britannica
    Sex, the sum of features by which members of species can be divided into two groups—male and female—that complement each other reproductively Sex, sexuality, and reproduction are all closely woven into the fabric of living things All relate to the propagation of the race and the survival of the
  • Martin Luther | Biography, Protestant Reformation, Beliefs . . .
    Martin Luther was a German theologian and religious reformer who initiated the Protestant Reformation in the 16th century Through his words and actions, Luther precipitated a movement that reformulated certain basic tenets of Christian belief Learn about his life, education, writings, excommunication, and legacy
  • Titration | Definition, Types, Facts | Britannica
    Titration, process of chemical analysis in which the quantity of some constituent of a sample is determined by the gradual addition to the measured sample of an exactly known quantity of another substance with which the desired constituent reacts in a definite, known proportion
  • Vesuvius | Facts, Location, Eruptions | Britannica
    Mount Vesuvius (Vesuvio), active volcano near Naples, Italy, famous for its eruption in 79 CE that destroyed the Roman cities of Pompeii, Stabiae, and Herculaneum Scientific study of the volcano began in the late 18th century Read here to learn more about Mount Vesuvius
  • Great Barrier Reef | Map, Animals, Bleaching, Facts | Britannica
    Great Barrier Reef, world’s largest coral reef complex, located in the Pacific Ocean off northeastern Australia It extends for more than 1,250 miles (2,000 km) in a northwest-southeast direction, and its width ranges from 37 to 155 miles (60 to 250 km) It has an area of some 135,000 square miles (350,000 square km)
  • Ottoman Empire | Facts, History, Map | Britannica
    Ottoman Empire, empire created by Turkish tribes that grew to be one of the most powerful states in the world in the 15th and 16th centuries Its dynasty was founded by a prince (bey), Osman, after the Mongols defeated the Seljuqs at the end of the 13th century The empire disintegrated after World War I





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