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Amargasaurus is a sauropod dinosaur with a long neck and four legs. But what makes it really stand out are the tall spines on the back of its neck.
Just what these spines did or would have looked like is still a mystery. Some scientists imagine they were connected by skin, like a sail. Others theorize they were covered in keratin, like horns. One study hypothesized that there were air sacs between them, helping oxygen travel more easily through their large bodies.
Amargasaurus would have held its head fairly low to the ground most of the time, likely at a comfortable feeding height for fairly low-growing plants.
Scientists have hypothesized that Amargasaurus would have actually run quickly for a sauropod.
From the brain case preserved with Amargasaurus, it seems its hearing likely wasn’t that good.