![](http://www.alamy.com/thumbs/6/048482B7-A6B9-4586-9F1A-DDFC076626A7/2BE0NAT.jpg)
Calcispongiae from Ernst Haeckel's Kunstformen der Natur, 1904
Kunstformen der Natur (known in English as Art Forms in Nature) is a book of lithographic and halftone prints by German biologist Ernst Haeckel
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Photo credit: © PD Archive / Alamy / Afripics
License: Royalty Free
Model Released: No
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