Dolphin cognitive abilities raise ethical questions, says Emory neuroscientist

ScienceDaily (2010-02-27) -- 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 regions, and highly differentiated cellular regions. This has ethical and policy considerations.