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eBook Dinosaurs, Asteroids and Superstars: Why the Dinosaurs Disappeared ePub

eBook Dinosaurs, Asteroids and Superstars: Why the Dinosaurs Disappeared ePub

by Jean Zallinger,Franklyn Mansfield Branley

  • ISBN: 0690042116
  • Category: Biological Sciences
  • Subcategory: Math Science
  • Author: Jean Zallinger,Franklyn Mansfield Branley
  • Language: English
  • Publisher: Thomas Y. Crowell Company; 1st edition (October 1, 1982)
  • ePub book: 1546 kb
  • Fb2 book: 1535 kb
  • Other: lit rtf docx lrf
  • Rating: 4.4
  • Votes: 679

Description

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Goodreads helps you keep track of books you want to read. by Franklyn Mansfield Branley.

Zallinger, Jean illustrator. Branley, Franklyn . (Franklyn Mansfield), 1915-2002 author. Catastrophes (Geology).

Discusses possible causes of the sudden extinction of dinosaurs at the close of the Cretaceous Period. by Franklyn Mansfield Branley and Zallinger Jean. Recently added by. rbeaudin, GATEACADEMY, kemptonlibrary, hermanm.

Large vegetarian dinosaurs started declining slowly at least 12 million years before the asteroid fell on their heads. According to Brusatte, the world of dinosaurs already knew many changes before the asteroid hit the Earth. It is not sure whether any species of dinosaurs would have survived if the huge asteroid had not fallen to Earth. Their disappearance was not an easy and fast story, as most people thin. hat we can now say with confidence is that when the asteroid fell and volcanoes began to erupt, it did not hit a world where everything was going well.

Branley considers the supernova theory, then its shortcomings, and deals more hospitably with the theories of asteroid collision and volcanic eruption. Finally he takes up the ""ring"" theory-that a ring of dense ash cloud formed around the equator, making winters colder and longer but not interfering with summer sun-which would explain why certain animals and plants survived and others didn't, and which is consistent with both the asteroid and volcano theories, whether the collision or eruption occurred on earth or the moon.

By Franklyn M. Branley.

Franklyn Mansfield Branley (Author). PreSchool-Grade 2- Branley tackles the mystery of what did in the dinosaurs in this addition to his popular science series. True to his intention, he provides a clear, easy-to-understand explanation of several possible causes for the dinosaurs' extinction. He includes disease, temperature change of the Earth, and even the idea that small animals devoured the dinosaurs' eggs as possible causes of death.

A discussion of the theories scientists have devised, on the basis of clues found in layers of rock and in fossils, to explain the sudden disappearance of dinosaurs