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A nineteenth-century Japanese portrait of Commodore Matthew Perry, who “opened up” Japan in 1854.
The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce
Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b
Daniel Burnham’s Flatiron Building (1902) was one of the first to use steel girders to hold up the b
Conservation biology arose in response to biodiversity loss
17th Century Physician Examining a Urine Specimen