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Patterns in Nature: Shells

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Photo: Cross-section of a nautilus shell
Photo: Blue-black clam mantlePhoto: Cross-section of a nautilus shellPhoto: Close-up of a scallopPhoto: Close-up of a snail shellPhoto: Close-up of a giant clam mantlePhoto: Pile of scallopsPhoto: Close-up of a giant clam mantlePhoto: Cherrystone clams
ENLARGEWALLPAPER
A cross-section of a nautilus shell in Boston shows the spiral of chambers, called camerae, that this cephalopod builds for itself as it grows.
Photograph by Todd Gipstein

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