Dinosaurs were recorded to be fierce and huge creatures of the past. They are considered as reptiles and feed mainly on meat and plants. Many people around the world are fascinated by these creatures. These have been featured in several movies already, like the Jurassic Park.

The word dinosaur was derived from the Greek words deinos and sauros which together means terrible lizard. Dinosaurs are prehistoric animals that have existed over 200 million years ago during the Mesozoic Era. These creatures have grown in many different kinds during their existence on earth and have disappeared mysteriously during the Cretaceous Period. Based on study, there are 700 types of dinosaurs which were identified but it is believed that there are more which have not yet been discovered.

Researchers continue to look for fossils to find answers to the existence of these prehistoric creatures. Fossils have been found in almost all the continents in the world. Most are found in Asia and North America.

Dinosaurs vary greatly in size. The smallest among the dinosaurs is the Compsognathus, similar to the size with a hen only. Among the largest is the Sauropod which measures at about 100 feet in length. This type of dinosaur features a long neck known as a plant eater.

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