Allosaurus was a large theropod dinosaur that lived during the Late Jurassic period, approximately 155 to 145 million years ago. Known for its role as one of the dominant predators of its time, Allosaurus was a formidable hunter, measuring up to 12 meters (39 feet) in length and weighing around 2.5 metric tons. Its robust build featured a massive skull with dozens of sharp, serrated teeth designed for slicing through flesh. The dinosaur's strong, muscular legs and a long tail provided balance and agility, while its relatively short but powerful arms ended in three-fingered hands equipped with large claws, ideal for grasping and holding onto prey. Allosaurus had a keen sense of sight and smell, aiding in its predatory lifestyle. Fossil evidence suggests it was a versatile carnivore, preying on a variety of herbivorous dinosaurs, and possibly engaging in pack hunting to take down larger prey. The discovery of numerous Allosaurus fossils in the Morrison Formation of North America has provided significant insights into the behavior, anatomy, and ecology of this iconic Jurassic predator.