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A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a
Average Global Temperature Rise over the Past Century
The Death of Socrates by Jacques Louis David. The eighteenth-century French painter David portrayed ...
Edmund Husserl (1859–1938). German philosopher who founded the field of phenomenology. In his ...
Early 20th century warming
A pedigree for albinism collected in the early years of the twentieth century by Charles Davenport,