We sometimes talk about "the brain" as if there's only one of them, but there's tremendous diversity in nervous systems between species, and even between individuals. On this episode of Unpopular Neuroscience Katie and Patrick discuss some of the most interesting brains they've encountered in the neuroscience literature and their own research careers. Learn more about the radically different brains, and surprisingly consistent behavior of jumping spiders, orcas, and french white-collar workers.