Megalosaurus (Buckland, 1824) was a large Theropod dinosaur of the Megalosauroid family and was the first dinosaur skeleton ever discovered. It was discovered by William Buckland in the 1820s, and recognized as a huge reptile. However, Richard Plot wrote a scientific paper on the bottom of this dinosaur's femur, which he called "Scrotum humanum", in 1627, nearly two centuries and 7 years before. The discovery of Megalosaurus changed the way scientists looked at Earth's past forever, since they then realized that humans weren't the first creatures to walk on this planet. For long time, every giant theropod founded in Europe (or even North America) was considered for a species of Megalosaurus. Because of this, for the decades in the Oxford university was an Eustreptospondylus, not Megalosaurus, how they learned there.
Megalosaurus was a very large theropod for its day, reaching between 28 and 39 feet (8.5 to 12 meters) long, and weighing 1.5 to 2 tons, it was the largest predator in its area of occurrence. It had somewhat short, but strong arms with sharp, hooklike claws on three fingers, perfectly designed for gripping onto prey and slashing at it. It also had long, powerful hindlegs, good for chasing down prey. Its tail, like most other theropods, was built to help balance it while moving. It had a long, narrow skull with sharp, bladelike teeth for slicing through the flesh of other creatures. But, his bite wasn't weaker than Allosaurus', despite his skull was much more flattened. That's because he had a very thick, neck, helping him to bite the victim very strong. He's designed for run, and his tail was moving from side to side when this dinosaur is walking. Mentioned tail is very hard, helping Megalosaurus to balance. It presents half of the Megalosaurus' weight. His hunting techniques were very cruel. first, he taken prey on the groun, then eat the victim alive. It was a close relative of the larger Torvosaurus of North America and the similarly-sized Edmarka, that nearly drove Allosaurus to outcompetition until considerably larger allosaurids such as Saurophaganax appeared. Megalosaurus for a long time was thought to have been a carnosaur, but closer analysis of the bones proved it was its own genus. The newer version of Megalosaurus looks much different than the old-fashioned version of dinosaurs, which looked like large, lumbering lizards instead of large, upright, birdlike reptiles. It used to be pictured looking closely like a large Komodo Dragon, walking on four stout, sprawled legs with its tail dragging on the ground.