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DINOSAUR
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Intresting Facts!!!
Dinosaurs walked the earth for over 165 million years. They lived during a period of time known as the Mesozoic Era, or Age of Reptiles. At the end of the Cretaceous Period they became extinct – that was around 65 million years ago. During this time there was a great deal of volcanic activity and many earthquakes.
Many people believe that dinosaurs became extinct because an asteroid hit the earth changing the climate dramatically. It is believed that dinosaurs couldn’t adapt to these changes.
The word dinosaur means terrifying lizard. This name was invented by Sir Richard Owen in 1842.
The oldest known dinosaur is Eoraptor, a meat-eater that lived 228 million years ago.
Most dinosaurs hatch from eggs, and they could not fly or live in water.
Dinosaurs are classified as reptiles. They are divided into two groups based on the structure of the hip. One group has lizard-like hips and the other group has bird-like hips.
The dinosaur periods!!
More facts!!!
The Mesozoic era was a period of history that stretched from 248 to 65 million years ago. It is divided into the three time periods in which the dinosaurs lived: the Triassic, Jurassic and Cretaceous. The term “Mesozoic” means “middle animals." The flora and fauna in the world during this period changed dramatically, with the evolution of dinosaurs, more diverse plants and the first mammals and birds.The Triassic period (248 to 206 million years ago) began and ended with a massive natural disaster which wiped out around 90 percent of the planet's species. The species that did survive then repopulated the Earth and evolved into completely new creatures. The oceans were packed full of life: mollusks, ammonites and the first corals lived alongside massive Ichthyosaurs and Plesiosaurs. Pterosaurs, a group of flying reptiles, dominated the air and the first large mammals and dinosaurs roamed the earth. One of the first dinosaurs was the Coelophysis, a carnivore which grew up to 9 feet tall and weighed up to 100 pounds.
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