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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
Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b
Major trunk lines carrying long-distance traffic crisscrossed the area east of the Mississippi. The
An agglutination inhibition reaction. Commercial kit materials would create an agglutination ...
Geopolitical Change of 20th-Century Europe