Dinosaurs

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Overview

Did you know that some dinosaurs may have sported early feathers? Or that other dinosaurs took good care of their babies? If you thrill to facts like these, read on. Each time you open Dinosaurs, you'll find superb illustrations, spectacular photography, stimulating text, and special features that offer many other paths to learning.

Introduces dinosaurs, discussing the different categories, what they looked like, what they ate, how we know about them through the ...

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Overview

Did you know that some dinosaurs may have sported early feathers? Or that other dinosaurs took good care of their babies? If you thrill to facts like these, read on. Each time you open Dinosaurs, you'll find superb illustrations, spectacular photography, stimulating text, and special features that offer many other paths to learning.

Introduces dinosaurs, discussing the different categories, what they looked like, what they ate, how we know about them through the study of fossils, and why they may have become extinct.

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Product Details

  • ISBN-13: 9781575849843
  • Publisher: Reader's Digest Children's Publishing, Incorporated
  • Publication date: 7/28/2002
  • Series: Reader's Digest Pathfinders Series
  • Edition description: Reprint
  • Pages: 64
  • Age range: 8 - 14 Years
  • Product dimensions: 8.04 (w) x 11.38 (h) x 0.20 (d)

Read an Excerpt

Chapter 3: Meet the Dinosaurs

The dinosaurs were a huge and varied group. This is reflected in their skeletons which show a variety of forms, from enormous frames that supported the largest animals ever to walk the Earth through to the delicate, elegant structures of the smallest dinosaurs. Despite such diversity of skeletal forms, there were many common themes that were replayed throughout their history.
SKELETAL DIVERSITY The secret of the dinosaurs' success lies partly in their design. Their legs were held directly under the body, allowing them to swing forward and backward and to avoid the sprawling gait characteristic of many other reptiles. A number of groups such as the theropods also had hallow bones that provided strength and support while keeping the animals' weight to a minimum. Sauropads also had weight-reducing adaptations in their skeletons. Despite, or, more properly, because of their immense size, their skeletons had to be as light as possible while still providing the strength needed to support their tremendous weight. The neck vertebrae, for example, had hallows and cavities with many of the processes reduced to struts. Edward Drinker Cope acknowledged this feature when he named CAMARASAURUS (box-lizard) after the hallow, box-like nature of this dinosaurs' neck vertebrae. There were also parts of the skeleton where structural strength was more important then weight-saving. Massive solid leg and arm bones held up by heavy bodies of sauropods, ceratopsians, stegosaurs, and ankylosaurs. Weight-bearing legs were held as straight as possible, improving their weight-carrying capacity. Armor, spikes, plates, and shields made of bone tended to make an animal heavy. It is no surprise that these features are found in dinosaurs that moved on all fours, where the extra weight could be distributed more evenly. In small dinosaurs, the emphasis was on flexibilty and agility. Small theropods and ornithipods had lightly built skeletons and a great deal of movement at the skeletal joints. They also tended to have very long legs for their size, indicating that they were fast runners able to duck and dive away from larger predators.
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Table of Contents

Introducing Dinosaurs 6
What Is a Dinosaur? 8
Triassic Times 10
Jurassic Giants 12
Cretaceous Conditions 14
The Two Hip Groups 16
What's Cool? What's Hot? 18
Survival 20
The Next Generation 22
Sharing Dinosaur Space 24
The Dinosaur Parade 26
The Meat-Eaters 28
The Plant-Eaters 30
The Long Necks 32
The Head Cases 34
The Armored Division 36
Big and Small 38
The Tough Guys 40
The Fast Movers 42
The Dinosaur Puzzle 44
Fossil Evidence 46
Following Fossil Clues 48
Famous Finds 50
Hunting for a Dinosaur 52
Reconstructing a Dinosaur 54
Brought Back to Life 56
When the Dinosaurs Died 58
Dinosaur Relatives Today 60
Glossary 62
Index 64
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Sort by: Showing 1 Customer Reviews
  • Anonymous

    Posted April 14, 2005

    My son loves it!

    My 6 year old son is fascinated by dinosaurs. He loves this book and is learning a lot of interesting facts! It's also helping his reading skills. I definitely recommend it to all!

    Was this review helpful? Yes  No   Report this review
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