**Acrocanthosaurus: The High-Spined Lizard** Acrocanthosaurus is a type of dinosaur that lived during the Early Cretaceous period, around 113 to 110 million years ago. This dinosaur was a bipedal predator, meaning it walked on two legs and hunted other animals. **Size and Appearance** Acrocanthosaurus was one of the largest dinosaurs in its environment. It could …

Acristavus is a unique group of dinosaurs that lived during the Late Cretaceous period, about 79 million years ago. Its name means “non-crested grandfather.” Acristavus belonged to a family of dinosaurs called hadrosaurs, known for their duck-like beaks. However, unlike most of its relatives, Acristavus did not have any fancy decorations on its head, like …

**Achillobator: A Unique Dinosaur from Mongolia** **Overview** Achillobator is a large dinosaur that lived about 96 to 89 million years ago during the Late Cretaceous period. It roamed in what is now Mongolia. This dinosaur belongs to a family called Dromaeosauridae, which are known for their sharp claws, speed, and predator traits. **Discovery History** The …

**Achillesaurus: A Dinosaur from the Past** Achillesaurus is a type of dinosaur that lived around 85 million years ago during a time called the Upper Cretaceous period. It was found in a place called Río Negro, Argentina, which was part of the ancient world back then. **What is Achillesaurus?** Achillesaurus is a part of a …

Acheroraptor is a type of dinosaur that lived during the Late Cretaceous period, around 67 to 66 million years ago. It belongs to a family of dinosaurs called Dromaeosauridae, which includes well-known species like Velociraptor. The name Acheroraptor comes from the Greek word “Acheron,” meaning “underworld,” referring to its discovery in the Hell Creek Formation …

Achelousaurus is a type of ceratopsid dinosaur that lived in North America during the Late Cretaceous period, about 77 to 74.8 million years ago. The first fossils of Achelousaurus were found in Montana in the late 1980s by a team led by paleontologist Jack Horner. Achelousaurus was officially named and described in 1994 by Scott …

Acanthopholis is a fascinating dinosaur that lived during the Late Cretaceous period about 97 million years ago in what is now England. This dinosaur belongs to a group called ankylosaurs, which are known for their tough, bony armor. Acanthopholis is specifically part of the Nodosauridae family and is known for its spiny armor, which gave …

Acantholipan is a type of dinosaur that lived a long time ago during the Late Cretaceous period, around 83.6 million years ago. This dinosaur was a herbivore, which means it ate plants. It was found in Mexico and belongs to a group of dinosaurs known as nodosaurids, which are part of the larger ankylosaurs family. …

Abydosaurus is a fascinating type of dinosaur known as a brachiosaurid sauropod. This dinosaur lived during the Early Cretaceous period, around 104.5 million years ago. The name Abydosaurus means “Abydos lizard.” It was named in 2010 by a scientist named Daniel Chure and his team, and they discovered its fossils in northeastern Utah, USA. One …

Abrosaurus is an extinct type of dinosaur that lived during the Middle Jurassic period, about 168 to 161 million years ago. It was first discovered in China at a famous fossil site called the Dashanpu Quarry, located in Sichuan Province. This dinosaur belonged to a group known as sauropods, which were large, long-necked dinosaurs. However, …