Can a brachiosaurus's neck really be held high like a giraffe's?

Diplodocus is famous for its extremely long neck, reaching up to 27 meters in length, with the neck accounting for about 6 meters. Traditionally, it was believed that Diplodocus could hold its neck high like a giraffe to browse on leaves at great heights. However, recent biomechanical studies have challenged this view. Detailed analysis of the cervical vertebrae structure reveals that the bones and ligaments were better suited for maintaining a horizontal posture rather than raising the neck vertically. Additionally, the shape of the joint surfaces on the cervical vertebrae restricted vertical movement. This discovery has reshaped our understanding of Diplodocus feeding behavior, suggesting it likely fed primarily on low-lying vegetation.