BUFFALO, N.Y. — They sleep during the day and forage at night. They can’t jump, but they’re excellent climbers. They have huge round eyes. And — unique among primates — they have a venomous bite. Meet ...

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This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...