Long before humans appeared, reptiles called dinosaurs roamed and ruled the Earth. Theirs was a very different world from ours, and many different types of dinosaurs learned to live among the thick forests and on the vast plains. Dinosaurs were the most successful animals that ever lived. They were the rulers of life on Earth for an amazing 165 million ears. Humans have been around for only about 100,000 years, so far. The first dinosaurs appeared 230 million years ago. The last of these creatures died out 65 million years. The earliest of the dinosaurs appeared in the second half of the Triassic period. At this time, the world looked very different from the way it does today because the land was all in one big piece, called Pangaea. There were no seas to block the way, so the Triassic dinosaurs were able to travel easily across the land. They were soon living all over the world. The large mass, Pangaea started to break into two continents. Many remarkable new dinosaurs came into existence. Did a huge meteorite strike Earth 65 million years ago and kill all the dinosars? Most experts believe this is what happened. The main evidence for the meteorite theory is a huge crater found in Mexico. Many other theories about what killed the dinosaurs have been proposed, but a giant meteorite is the most likely one.
Friday, 7 June 2013
Dinosaurs
Dinosaurs
Long before humans appeared, reptiles called dinosaurs roamed and ruled the Earth. Theirs was a very different world from ours, and many different types of dinosaurs learned to live among the thick forests and on the vast plains. Dinosaurs were the most successful animals that ever lived. They were the rulers of life on Earth for an amazing 165 million ears. Humans have been around for only about 100,000 years, so far. The first dinosaurs appeared 230 million years ago. The last of these creatures died out 65 million years. The earliest of the dinosaurs appeared in the second half of the Triassic period. At this time, the world looked very different from the way it does today because the land was all in one big piece, called Pangaea. There were no seas to block the way, so the Triassic dinosaurs were able to travel easily across the land. They were soon living all over the world. The large mass, Pangaea started to break into two continents. Many remarkable new dinosaurs came into existence. Did a huge meteorite strike Earth 65 million years ago and kill all the dinosars? Most experts believe this is what happened. The main evidence for the meteorite theory is a huge crater found in Mexico. Many other theories about what killed the dinosaurs have been proposed, but a giant meteorite is the most likely one.
Long before humans appeared, reptiles called dinosaurs roamed and ruled the Earth. Theirs was a very different world from ours, and many different types of dinosaurs learned to live among the thick forests and on the vast plains. Dinosaurs were the most successful animals that ever lived. They were the rulers of life on Earth for an amazing 165 million ears. Humans have been around for only about 100,000 years, so far. The first dinosaurs appeared 230 million years ago. The last of these creatures died out 65 million years. The earliest of the dinosaurs appeared in the second half of the Triassic period. At this time, the world looked very different from the way it does today because the land was all in one big piece, called Pangaea. There were no seas to block the way, so the Triassic dinosaurs were able to travel easily across the land. They were soon living all over the world. The large mass, Pangaea started to break into two continents. Many remarkable new dinosaurs came into existence. Did a huge meteorite strike Earth 65 million years ago and kill all the dinosars? Most experts believe this is what happened. The main evidence for the meteorite theory is a huge crater found in Mexico. Many other theories about what killed the dinosaurs have been proposed, but a giant meteorite is the most likely one.
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