i6 MIGHTY ANIMALS 



them none were more powerful than the Dino- 

 saurs, for they were the largest of all animals 

 that have ever walked the earth. Even their 

 name sounds terrifying, for Dinosaur means Terri- 

 ble Lizard. 



These monsters were scattered over the world, 

 but the United States, especially the western por- 

 tion, seems to have been their headquarters. Im- 

 mense quantities of their bones have been found in 

 Wyoming and Montana, and many others have been 

 unearthed in Colorado. We know that these 

 creatures also roamed over other parts of our 

 country, and in some places even the marks of 

 their footprints are to be seen in the rocks. By 

 comparing all the Dinosaur bones and footprints 

 discovered in the world men have been able to 

 learn how different from one another many of 

 these animals were in their looks and habits. 



That some were flesh eaters and that others ate 

 only plants, is shown by the formation of their 

 teeth. There were big ones that were weak and 

 small ones that were strong. Certain kinds 

 walked on all fours, while the front legs of others 



