Birds evolved from dinosaurs, and some dinosaurs were warm-blooded. Mammals existed at the same time as dinosaurs, and most dinosaurs were vegetarian. Many dinosaurs had some form of intelligence as well.Know More
Modern species of birds evolved from a common feathered ancestor, the theropod, starting around the end of the Jurassic and Cretaceous periods. Even though modern reptiles are cold-blooded, which means that their body temperature fluctuates with the surrounding climate, most carnivorous dinosaurs were more likely to be warm-blooded because of their predatory lifestyle, which is why birds are also warm-blooded. Meat-eating predators like the Tyrannosaurus rex and Giganotosaurus are rare compared to the amount of dinosaurs that had a vegetarian diet. Paleontologists speculate that herbivorous dinosaurs like the hadrosaurs, ornithopods and sauropods grazed on vegetation in herds like modern cattle graze in pastures.
The mammals that lived during the same time period as dinosaurs lived in treetops far away from predators during most of the Mesozoic Era. These mammals were small and furry and looked like mice. Other mammals, such as the 50-pound Repenomamus, hunted dinosaurs. Hunters such as T. rex and Troodon had more grey matter than herbivores like the stegosaurus. These predators had more thinking power than their prey and had a keen sense of coordination and heightened senses.Learn More
True dinosaurs were not swimmers. There were a number of very large aquatic reptiles that lived during the age of the dinosaur, but they were not technically dinosaurs. These creatures belonged to one of several other groups, such as ichthyosaurs, plesiosaurs and mosasaurs, which were types of marine reptiles.Full Answer >
There are a few well-researched theories about why dinosaurs are extinct; one of the most prominent theories hypothesizes that a massive asteroid impact killed off the dinosaurs. Another states that heavy volcanic eruptions across the Earth may have been responsible.Full Answer >
The fossilized remains of Sue the T. rex were found near Faith, S.D., during the summer of 1990. As of 2014, Sue is considered to be the largest and most complete skeleton of Tyrannosaurus rex ever found. Sue measures 40.5 feet and weighs over 3,900 pounds.Full Answer >
The tallest dinosaur is the Brachiosaurus brancai, according to the Guinness Book of World Records. It was 43 feet 6 inches tall. This skeleton is on display at the Museum für Naturkunde der Humboldt Universität zu Berlin in Germany.Full Answer >