Evolution: Brain Power | Full Documentary | NOVA | PBS

Video length: unknown. Using dolphins as our window into observation, this film traces the pivotal leaps in brain intelligence across billions of years of evolution. From simple neural networks to highly complex brain structures, the documentary connects the core mysteries surrounding the origins of intelligence in marine mammals, revealing how evolution gradually shaped the trait we call "smart." The highlight lies in transforming abstract evolutionary theory into a visual biological narrative — why do dolphins possess such large, highly folded brains? And how have their sociability and language abilities, in turn, driven further increases in brain capacity? Through cutting-edge neuroscience discoveries and oceanic observation data, the film clearly lays out the causal chain of the encephalization process. This documentary is well-suited for audiences interested in evolutionary biology, animal behavior, or science programming — particularly recommended for learners who wish to grasp macroevolutionary principles through the lens of a specific species. Viewing with note-taking in mind is suggested, with particular attention paid to recording comparative brain-structure data between dolphins and other marine mammals.