Eight arms - but four work hard

Humans may be right-handed or left-handed. It turns out octopuses don't have a dominant arm, but they do tend to perform some tasks more often with their front arms, new research shows.

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Washington -

Scientists studied a series of short videos of wild octopuses crawling, swimming, standing, fetching, and groping — among other common activities — to analyze how each of the eight arms were moving.