The Panda's Thumb: More Reflections in Natural History | 
I had learned that a dexterous, opposable thumb stood among the hallmarks of human success. We had maintained, even exaggerated, this important flexibility of our primate forebears, while most mammals had sacrificed it in specializing their digits. Carnivores run, stab, and scratch. My cat may manipulate me psychologically, but he'll never type or play the piano.
Libby1 But have you seen the video of Piano Cat? 😄 8y
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