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44 Questions from Britannica’s Most Popular Health and Medicine Quizzes
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Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses
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Why Are U.S. Elections Held on Tuesdays?
Vincent Van Gogh, Self Portrait. Oil on canvas, 1887.
Rediscovered Artists: 6 Big Names That Time Almost Forgot
Jackson (Wyoming, United States). Jackson Lake (also called Jackson Hole), southern end of the Teton Range (the Grand Tetons), Grand Teton National Park, Wyoming, USA
7 Wonders of America
David Cameron. President Barack Obama and Prime Minister David Cameron of the United Kingdom talk during the G8 Summit at the Lough Erne Resort in Enniskillen, Northern Ireland, June 17, 2013
What’s the Difference Between a President and a Prime Minister?
Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.
5 Remarkably Close U.S. Presidential Elections

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pathology

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chronic obstructive pulmonary disease

  • Chronic obstructive pulmonary disease (COPD) results from the inhalation of noxious particles that cause progressive lung damage. COPD is characterized by emphysema, in which holes form in the walls of lung alveoli, and by excessive mucus production, which causes symptoms of bronchitis.
    In chronic obstructive pulmonary disease

    …as difficulty in exhaling (called flow limitation), which causes increased lung volume and manifests as breathlessness. Other early symptoms of the condition include a “smokers cough” and daily sputum production. Coughing up blood is not a feature of COPD and when present raises concern about a second, tobacco-related condition, particularly…

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