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Thousands of species of animals probably have consciousness
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Human brain is the most complex thing in the universe that we know of so I'd say we're somewhat special. This however doesn't change the fact that a rat's brain ranks pretty high up on that list aswell.
Sometimes I wish I was more on the rat brain end, but maybe more the spoiled family dog end.
actually, almost all cetacean brains are more complex than human brains by every measure; more neurons, more interconnections, greater size, more convolutions on the surface.