Influential German evolutionist, morphologist, and developmental biologist (1834-1919) remembered as a supporter and exponent of Charles Darwin's theories. ALS in German, one page on a 5.5 x 3.75 postcard, October 28, 1905. Untranslated handwritten postcard by Ernst Haeckel to writer Maurice Magnus. In fine condition, with two punch holes to the left edge.
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