Animals efore Man 



years, why should not a dinosaur grow to be 

 much older? 



Certainly it must have taken Brontosaurus 

 some time to have attained a length of 75 

 feet, or Camarasaurus to have grown a femur 

 6 feet long. That dinosaurs kept on grow- 

 ing for many years we know, for they come 

 in assorted sizes, and this is one of the diffi- 

 culties that confronts the paleontologist, since 

 he can place but little reliance on mere size 

 as an aid in determining the ownership of a 

 bone. So it is possible that these reptiles 

 grew on and on through centuries in the days 

 when the earth was young and time not worth 

 a dollar a minute to the man of business. And 

 there are those who think that the many yards 

 of Brontosaurus, who might well have said with 

 Kaa, " I am a good length," means a length of 

 not less than five hundred of our years. 



It was said that in this group of dinosaurs 

 the head was small, and this may perhaps be 

 suggested by trying to imagine an elephant 

 brandishing a horse's head at the end of his 

 trunk. A queer combination surely, but so far 



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