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Cover of the Ticknor & Co. first edition of Looking Backward, 2000–1887
Cover of the Ticknor & Co. first edition of Looking Backward, 2000–1887
German Reclam edition 1919
German Reclam edition 1919
Atavism
Early embryos of various species display some ancestral features, like the tail on this human embryo. These features normally disappear in later devel
Early embryos of various species display some ancestral features, like the tail on this human embryo. These features normally disappear in later development, but it may not happen if the animal has an atavism.