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How has the octopus become so intelligent and capable of thinking in the abstract? Watch fascinating and often hilarious experiments to see just how smart they …
https://en.wikipedia.org/wiki/%D8%AE%D9%88%D8%A7%D8%B1%D8%AC
https://en.wikipedia.org/wiki/%D8%AE%DB%8C%D8%A8%D8%B1_%EF%AD%98%EF%BA%A8%EF%BA%98%EF%BB%AE%D9%86%D8%AE%D9%88%D8%A7
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