Flashback Friday: Why don’t octopus arms get stuck together?

Octopus arms are truly amazing. They can move in all directions, and they are covered in suction cups that stick to virtually every surface they come into contact with. So how do these incredibly adhesive octopus arms avoid getting all tangled up together? The research presented in this paper suggests that octopus suckers do not spontaneously stick to octopus skin (unlike other surfaces) due to a chemical embedded within the skin itself. However, this natural barrier that prevents sticking c

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