THIS new book by the indefatigable Haeckel is supplementary to his “Riddle of the Universe.” That several hundred thousand copies of the “Riddle” were sold indicates the widespread ...

After completing his studies in medicine and biology, a restless Ernst Haeckel set off for Italy in 1859 to study art and marine biology. The diversity of life fascinated the 26-year-old Prussian, and ...

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