2Millions of years ago, Great beasts called "dinosaurs" thundered over the earth.Yet up until the lastcentury, when thefirst dinosaur fossilswere discovered, noone even imaginedsuch animals existed.
3Dinosaurs Before there were any people there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era the “Age of the Reptiles”
4The name dinosaur comes from the term Dinosauria, which means terrible lizards.
5Dinosaur is the name of a group of prehistoric reptiles that ruled the earth about 160 million years ago.These animals died out millions of years ago, but they have fascinated people ever since they were first described in the early 1800’s.
6Kinds of DinosaursDinosaurs varied greatly in how big they grew, how they looked, and where they lived. Some of the most famous were such gigantic animals as Apatosaurus (uh pat uh SAWR uhs), Diplodocus (duh PLAHD uh kuhs), and Tyrannosaurus (tih ran uh SAWR uhs). Apatosaurus (formerly called Brontosaurus) grew about 70 feet (21 meters) long. Diplodocus reached an even greater length -- about 90 feet (27 meters).
7AllosaurusDo you knowwhat theUtah StateFossil is?
8The allosaurus was designated The Utah State Fossil: The AllosaurusThe allosaurus was designatedthe State Fossil in More allosaurus specimens have been found in two of Utah's quarries than any other dinosaur. Sixty individuals, fromjuveniles to adults, were foundat one site in Utah.
9Big Al Nickname: Different Lizard Age: million years ago during the late Jurassic PeriodSize: feet long (as long as two big Python snakes!)Weight: Anywhere from 2 tons to over 5 tonsCharacteristics: Sharp claws up to 6 inches long. Teeth up to almost 4 inches longSpecial Talents: Super smart compared to other dinosaurs. Extremely fierce. Known to attack other dinos twice his size.
10Where Dinosaurs Lived See the world as it looked during the Jurassic Period!
11The Jurassic climate was warm The Air was damp, like a tropical forest
12PaleontologyPaleontology (PAY lee ahn TAHL uh jee), is the study of animals, plants, and other organisms that lived in prehistoric times (more than 5,500 years ago). Fossil remains of organisms occur in layers of sedimentary rocks (rocks formed when mineral matter settled out of air, ice, or water). The organisms that are now fossils were alive when the rocks were being formed. They were buried and preserved as the layers of rock piled up.
13So what do you think a Paleontologist is? is a scientistwho studiespaleontology,learning aboutthe forms of lifethat existed informer geologicperiods, chiefly bystudying fossils.
14Fossils are the reason we have most of this information Fossils are the reason we have most of this information. For almost 200 years, paleontologists have been discovering fossils all over the world. They’ve identified more than 330 different kinds of dinosaur fossils. And every year, they find new fossils. These fossils can tell us how big an animal grew, what it ate, even how it died.
15Dinosaur National Monument Utah/ColoradoA stony frieze at one of the continent’s largestand richest dinosaur quarries holds the bones ofbeasts that ruled the Jurassic: stegosaurs,allosaurs, apatosaurs and many more.
16The first dinosaur to be described scientifically was Megalosaurusin 1824, by William Buckland.Buckland ( ) was aBritishfossil hunter andclergyman who discoveredsome Megalosaurus fossils in1819 and named the reptilein It was the first dinosaurever described scientifically andfirst theropod dinosaur discovered(this is all in hindsight, because the dinosaurs had not yet beenrecognized as a separate taxonomic group - the word dinosaurhadn't even been invented yet).
23The Food Chain Meat-eating animals (carnivores like Tyrannosaurus rex) get their energy by eating other animals, mostly plant-eatinganimals (herbivores like Triceratops). The herbivoresget their energy by eating plants (like cycads).
24Where Did Everybody Go? You may have noticed that there are no dinosaursaround these days.In fact, there haven'tbeen any around forabout 66 millionyears.