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Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
A woman in a net on a Congo shore. Although the importation of slaves was illegal after 1807, histor
That politics was always a rough business is shown in this cartoon, which shows Lincoln, assisted by
A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a
From 1965 to 1968, American troops in Vietnam conducted “search and destroy” missions to shatter ...
American people aren't the only ones getting bigger—American pets are also putting on pounds