Dinosaurs

Dinosaurs were the dominant terrestrial vertebrate animals for over 160 million years; form the late Triassic period (about 230 million years ago) until the end of the Cretaceous period (about 65 million years ago). There are many different kinds of dinosaurs; carnivorous, herbivorous, marine reptiles, non-dinosaur reptiles, and pterosaurs. The first dinosaur was the Megalosaurus found in 1676. The dinosaur was named in 1824 by William Buckland. Was up to 30 feet long (9m), 10 feet tall (3m), and weighed about 1 ton. These dinosaurs walked on two powerful legs, had a strong, short neck, and a large head with sharp, serrated teeth. It had a massive tail, a bulky body; toes also had sharp claws, and heavy bones. Its arms were short and had three-fingered hands with sharp claws. Megalosaurus means “Great Lizard.” This dinosaur is a carnivore. The Megalosaurus lived in present day Europe and it hunted down Stegosaurus, Iguanodon, and Sauropods. http://dinosaurs.about.com/od/typesofdinosaurs/Types_of_Dinosaurs.htm

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 Peoples Favorites

· Brachiosaurus

Some of our favorite dinosaurs are the brachiosaurus, t-rex, and many others. The brachiosaurus was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. This dinosaur lived in the middle to the late Jurassic period, about 156-145 million years ago, near the middle if the Mesozoic Era, the age of Reptiles. Some dating estimates have Brachiosaurus surviving until 140million years ago, during the dawn of the Cretaceous period. It was one of the tallest and largest dinosaurs yet found. The Brachiosaurus had a long neck, small head, and relatively short, thick tail. Something weird about any other of these dinosaurs is that its front legs were longer than its hind legs. Brachiosaurus had 26 feet on its top jaw and 26 on the bottom for a total of 52 teeth towards the front of the mouth. It had chisel-like teeth, its nostrils were on the top of its head, and it had large nasal openings indicating that it may have a good sense good smell. This dinosaur is an amazing creature that walked the earth.

· T-rex

The Tyrannosaurus is many peoples favorite. Tyrannosaurus stands for “tyrant lizard.” One of the biggest meat-eating dinosaurs to ever walk the planet. This big dinosaur lived 85 million to 65 million years ago. These tyrant lizards lived in a humid, semi tropical environment, in open forests with nearby rivers, and in coastal forested swamps. People may say that these were the largest, but they aren’t. The Giganotosaurus and the Carcharodontosaurus are a little bit bigger. Tyrannosaurus walked on two feet and had two small arms. This dinosaur was up to 40 feet (12.4) long, about 15 to 20 feet (4.6 to 6m) tall. The arms are about (1m) long, and all together its weight was up to 6 to 7 tons. Its jaw was up to 4 feet long and it was up to 40 feet long.

Roaming on earth.

When dinosaurs lived long ago they ran up to 10 miles per hour. You would think they would run slow, but they really don't. This video shows how the t-rex runs. These dinosaurs are so heavy that when they run the ground vibrates. They leave footprints in the ground that are at least 46cm long and 1m long. The way these dinosaurs walked were amazing and a little weird.

Tyrannosaurus Walk Cycle from Tom Spilman on Vimeo.



Reproduction

Dinosaurs hatched from eggs laid by females after sexual reproduction. The eggs were round or elongated and had hard, brittle shells. Internally, these eggs were similar to those of reptiles, birds and primitive mammals; they contained a membrane (called the amnion) that kept the embryo moist. Some dinosaurs cared for their eggs, others simply laid them and then abandoned them. These eggs are 1 foot (30 cm) long, 10 inches (25cm) wide, had a volume of about half a gallon (2liters), and may have weighed up to 15.5 pounds (7kg). The smallest dinosaur egg possible is 1 inch across and it is from the dinosaur Musssaurus.

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The Big Bang.

65 million years ago an asteroid hit the surface of the earth and made the earth so hot that it quickly killed unproductive life. The asteroids impact would of thrown enough dust into the air that the sun was not visible and it led to a cold dark winter that got rid of all vegetation. The force of this impact was equivalent to 100million megatons of TNT, which threw debris high into the air. Most dinosaurs died when it hit, but most stayed alive after a couple of hours. The types of organisms that were sheltered are the ones that didn't die and made it through. Some examples are birds, crocodiles, and turtles. If an asteroid hit earth right now it would be devastating like it did 65million years ago.

Dinosaur shows

  • Jurassic Park
There are many people in the world that love dinosaurs. These people make it so we can actually see how these dinosaurs lived and were brought up to be adults. Jurassic park for example is a movie of how a scientific technology can create an island full of living dinosaurs. It takes you on a scary and thrilling adventure through each dinosaur created. In the movie the electricity was shut down because someone was trying to steal the embryos of the dinosaurs. There are three in this series of movies.

http://www.imdb.com/video/hulu/vi2513764377/

  • The land before time.

The land before time is directed more towards younger kids. The plot of this story is when a baby longneck (little foot) who is prhaned when his mother was attacked by a Sharp tooth (t-rex). Little foot flees to find the "Great Valley" an area that has spared devastation. On his journey he meets four young companions that go through journeys along the way. This was a TV show that was made in 1988.

**The** Death of Little foot’s Mother

Making Dinosaurs Today.

Some may say this is possible and some may say it's not, but for me I am in-between. In Jurassic park they take dinosaur DNA from a prehistoric mosquito trapped in amber. Amber is a type of sap. They take the DNA from the mosquito and create dinosaur DNA. With the DNA that's missing they fill it in with frog DNA. This creates an actual dinosaur. Obviously, your thinking this is impossible, but for me I think it's possible. Scientist are still trying today to find how to make an actual dinosaur.

http://acfnewsource.org.s60463.gridserver.com/science/dino_rebirth.html

Dinosaur teeth

Some teeth can be huge and some teeth can be tiny, but most of all they are all mighty. Each dinosaur has a different set of teeth. For meat eaters they are long and sharp. Plant eating sauropods have leaf shaped teeth. Every dinosaur has a different personality, shape, and tooth shape, but just about every dinosaur has to learn how to survive.
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