NOVA: Inside Animal Minds - Who's The Smartest?
Preview | 30s
What makes an animal smart? Many scientists believe the secret lies in relationships. Some of the cleverest seem to be those who live in complex social groups, like dolphins, elephants and apes. (Also Fri. 4/25 at 3AM; Sun. 4/27 at 1PM)
Aired: 04/23/14
Expired: 04/23/14
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