Very odd fact about octopus arms

t's a mystery that's long baffled scientists - how does an octopus prevent its eight arms from becoming entangled, when each limb behaves independently of the other seven and the animal's brain ? Neuroscientists Guy Levy and Nir Nesher say they have the answer - chemoreceptors on the rim of each sucker which sense molecules in the skin, inhibiting the grabbing reflex. Octopus arms are autonomous. When severed, they can move for up to an hour.