Cartoons often suggest turtles wear shells like removable armor. Those stories show turtles stepping out, swapping shells, or treating them like clothing. Biology disagrees. A turtle shell is not an ...
Sea mollusc shells are patterned not through conscious control, but by chemistry acting at the shell’s growing edge. A thin strip of tissue known as the mantle secretes both the shell material and its ...
April 13 (UPI) --Ammonoids, an ancient group of mollusks, used the wavy lines found inside their shells to fine-tune their buoyancy, according to a new study. Prior to their disappearance at the end ...
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