Dolphin cognitive abilities raise ethical questions, says Emory neuroscientist

Many modern dolphin brains are significantly larger than those of humans and second in mass to the human brain when corrected for body size, says a scientist. Some dolphin brains exhibit features correlated with complex intelligence, including a large expanse of neocortical volume that is more convoluted than that of humans, extensive insular and cingulated [...] http://bit.ly/a6YtY3