Hans-Dieter Sues - Curator, Paleontology, National Museum of Natural History In a fit of pique, according to one of Aesop's fables, the god Hermes made the animal carry its house forever on its back.

The turtle’s shell provides it with a formidable defence and one that is unique in the animal world. No other animal has a structure quite like it, and the bizarre nature of the turtle’s anatomy also ...

Francis Horne, a biologist who studies shell formation at Texas State University, offers this answer. The exoskeletons of snails and clams, or their shells in common parlance, differ from the ...