Ankylosaurus

Ankylosaurus is a genus of armored dinosaur that lived during the Late Cretaceous Period, about 66-65 million years ago. It was a large, herbivorous dinosaur, with an estimated length of about 23-26 feet and a weight of about 4-5 tons. Ankylosaurus had a heavily-armored body, with a thick, bony plate covering its back, sides, and tail. It also had a club-like tail, which it may have used as a weapon to defend itself against predators. Its body was probably covered in a layer of tough, scaly skin.

Ankylosaurus was discovered in the western United States in the early 1900s, and was named by paleontologists in 1908. It is considered a member of the ankylosaurid group of armored dinosaurs, which also includes species such as Euoplocephalus and Saichania. Ankylosaurus is known from a number of well-preserved fossil specimens, including several partial skeletons and skulls, which have helped paleontologists learn more about the anatomy and behavior of this dinosaur.