Why This Octopus Isn't Stuck-Up

Some chemical in octopus skin acts as a repellent to the little suction cups on the arms, a surprise finding shows. Without it, the eight-armed creature would tie itself in knots.

Source: http://www.npr.org/2014/05/15/312575546/why-this-octopus-isnt-stuck-up?ft=1&f=1007

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