Acrocanthosaurus was about as large and heavy as Tyrannosaurus and Giganotosaurus.
Acrocanthosaurus was about as large and heavy as Tyrannosaurus and Giganotosaurus. Unlike many other dinosaurs, its skull had not five, but seven openings. On the neck, back, and tail, its vertebrae were extended by numerous spines that probably formed a small sail.
Fun fact: The openings in the Acrocanthosaurus' skull helped lighten its gigantic head.
3+
