They were creatures of the air, but they aren't part of the avian family tree — and don't call them dinosaurs. What was life like for the pterosaurs, and what has sparked renewed interest in these flying reptiles?
A stunning array of strange and ferocious aquatic beasts patrolled Earth's waters long before they became the stuff of legends and "Jurassic Park" movies. One could eat a great white shark in one gulp.
If you thought sea monsters were just the stuff of myth, you thought wrong. With giant, razor-sharp teeth, ancient cetaceans — the ancestors to modern whales, dolphins and porpoises — make even nightmares seem dull.
OK, hop in your time machine and go back 67 million years or so to the Cretaceous period. Then find a Tyrannosaurus rex and challenge it to a race. Sounds crazy, huh? Could you really outrun a Tyrannosaurus rex?
It isn't hard to imagine this scene even though dinosaurs haven't walked the earth for millions of years. Dinosaurs have captured our imaginations. These dinosaur articles have been written to lead you into the exciting world of dinosaur research and back to the "Age of Dinosaurs."
Diplodocus was an incredibly large dinosaur. It is the longest dinosaur known from complete skeletons. A fully grown adult could reach a length of 90 feet. Skeletons of this massive dinosaur have been found in North America.
Supersaurus was a dinosaur that truly deserved its name. It measured about 100 feet in length and lived in North America. This dinosaur lived on a diet that consisted mostly of chutes and leaves from the tops of trees.
Acrocanthosaurus was a sauropod of spectacular proportions. In some ways it looked like many other meat-eating dinosaurs, but it had a sail along its back. See pictures and learn more about this dinosaur.
Carnotaurus (its name means "meat bull") is known from a single, nearly complete skeleton that had skin impressions over much of the skull and body. Read more about this South American dinosaur's unusual features.
Discovered in 1966 in Niger is africa, this new dinosaur was first named and studied in 1976. Its name means "brave reptile." See why it is one of the most puzzling large ornithopods of the Cretaceous.
Tenontosaurus was a medium-size ornithopod dinosaur from Montana and Wyoming. Skeletons range in size from very small juveniles to almost 22-foot-long adults. Learn more about how this dinosaur lived and what it ate.
Dinosaur evolution looks at how dinosaurs developed and changed over the course of time. Paleontologists study the different types of dinosaurs and how they are related to each other. How else is dinosaur evolution studied?
Dinosaurs became extinct at the end of the Cretaceous Period. How and why is a puzzle that paleontologists are trying to solve by studying fossils and rock formations. Learn more about the different extinction theories.
Interest in dinosaurs soared to new heights in the 1990s, thanks largely to the blockbuster film Jurassic Park. So too did dinosaur discoveries. Since 1990, more than 100 new dinosaur genera have been described and named. Learn more about recent dinosaur discoveries.
Bagaceratops rozhdestvenskyi was a small protoceratopsian with a big name: "baga" is the Mongolian word for "small," "ceratops" means "horned face," and the species name is in honor of Russian paleontologist A. K. Rozhdestvensky. Learn more about Late Cretaceous dinosaurs.
Centrosaurus, which means "sharp-point reptile," was named by Lawrence Lambe in 1902 from specimens found along the Red Deer River in Alberta. A number of complete skulls and skeletons have since been discovered. Learn more about the Centrosaurus.