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Extinction Of Dinosaurs
Beginning of essay
Biology
6th Period
Two-hundred and thirty million years ago the first dinosaur-like
creature roamed the earth. Within five million years it could be considered a
dinosaur. They were soon at the top of the food chain. They populated every
continent. Then 65 million years ago they vanished. Th ....
Middle of essay
....died with
them. Since there are many theories about this I will not write about them all.
I have chosen the theory about death by Cosmic Collision (an asteroid).
In 1980 Luis Alvarez and John Sepkowski Jr., famous geologists, blamed
the extinction of the dinosaurs on a large celestial body which hit the Earth 65
million years ago. According to them, an asteroid five miles across blasted
through the Earth's crust, and threw up molten rock, ash, and dust. Adding to
the support to this theory .... |
| Number of words: 684 |
Approximate pages: 3 |
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