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The Smartest Dog In the World

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The Smartest Dog In the World

Anderson Cooper meets Chaser, a dog who can identify over a thousand toys, and the scientists who are studying the brain of man’s best friend.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

September 21, 2015 |
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