JOHN SIBBICK / SCIENCE PHOTO LIBRARY JOHN SIBBICK / SCIENCE PHOTO LIBRARY
Sauropod dinosaur stomach. Computer illustration of a section through the stomach of a Brachiosaurus sp. sauropod dinosaur stomach, showing the thick muscular lining. This muscle structure and embedded stones, which were deliberately swallowed by the dinosaur, enabled sauropods to reduce even the toughest plant food to a thick paste.
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