How many brains does an octopus have?
An octopus brain (lower, right) has 50 to 75 lobes and at least as many neurons (about 100 million) as a mouse brain (lower, left). And that’s not counting the smaller "brains" in each arm and the still smaller "brains" (ganglia, technically) brains associated with each sucker. The exact number of "brains" is unknown as scientists are still unraveling this mystery. ChaCha!
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