Saltasars

Ferns, conifers, and ginkgos grew at the Auca Mahuevo site, providing food and nesting materials for sauropods. The identity of the egg-laying dinosaur is unknown, but it is thought to have been a titanosaur, possibly Saltasaurus, as the skin of babies found at the nest site has bumps on it, which may have developed into the bony nodules known in adults.

Skeletons of some sauropods appear to have been designed to enable them , to stand up on their hind legs

Skeletons of some sauropods appear to have been designed to enable them , to stand up on their hind legs

Short front legs were a weight-saving design that could be lifted off the ground, shifting the center of gravity to the animal's rear half
Tail acted like a "third leg," providing stability as it stretched up to reach the leaves at the top of trees
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