Some dinosaurs needed long necks to reach high in the trees, loading their enormous guts with enough roughage to supply a small forest. These were the dinosaurs with the longest necks, so lengthy in stature that their height reached that of a four-story building while standing upright. Giraffes had nothing on these prehistoric skyscrapers.
And there were many species of long-necked dinosaurs. While each one had a long neck, they all had different traits that set them apart. Here are five species of this enormous dinosaur.