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NOVA SCIENCENOW
S5 Ep4: How Smart Are Dogs?
- Aired: 02/09/2011
- 14:52
- Expires:
- Rating: NR


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