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Title: Sponge Fossil
Caption: Fossilized sponge (Ventriculites sp.) with a skeleton of silicaceous spicules. This specimen is 30mm long, and was found in Cretaceous Period deposits in Europe.
Credit: Album / Science Source / BIOPHOTO ASSOCIATES
Image size: 5111 × 3418 px | 50.0 MB
Print size: 43.3 × 28.9 cm | 2012.2 × 1345.7 in (300 dpi)