NOVA scienceNOW How Smart Are Dogs?
Meet an extraordinary boarder collie and other dogs changing our view of dog intelligence. Details
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The Meaning of Dog Barks
Listen to a variety of dog barks—from woofs to whines—and try to interpret their meaning.
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Your Favorite Smart Animal
Hear experts "pitch" for dogs, cats, honeybees, hyenas, and other smart species, then vote...
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A Potpourri of Pooches
How come dogs, alone among Earth's species, come in so many shapes and sizes?
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How Smart Are Dolphins?
These brainy marine mammals can "read," plan ahead, and communicate in astounding ways.
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