Cats have however learned how to pul our invisible strings to bring them food, and don;t need to learn to know how to uncover their own. So, who is smarter now?
http://news.yahoo.com/s/livescience/20090713/sc_livescience/catsdocontrolhumansstudyfinds

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Renderosity Store  Personal nick: Conniekat8
Hi, my name is "No, Bad Kitteh, NOO", what's yours?