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Distribution of glaciers in North America (a) in the late twentieth century, and (b) 18,000 years ag
A reindeer sled, Arkhangelsk, Russia. Late nineteenth-century photochrom.
Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
These illustrations show Ellen Craft, a slave with and without a disguise. She dressed “as a disting
L. Frank Baum, author of The Wonderful Wizard of Oz (1900) and a fan of William Jennings Bryan, perh
17th Century Physician Examining a Urine Specimen