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His-Embryo - Public domain zoological illustration
Summary
Comparison of a human and a pig embryo. The embryos look remarkable different and contradict Ernst Haeckel's biogenetic law.
Tags
Date
1891
Source
Wilhelm His: Über unsere Körperform und das physiologische Problem ihrer Entstehung, F.C.W. Vogel. Leipzig 1891.
Copyright info
public domain
