Is the size of a mammals brain proportional to it's intelligence? For instance, how big is the brain of an elephant, a rhinoceros, or a whale? How big was the brain of a huge dinosaur?
Is the size of a human brain indicative of their intelligence? What is the largest and smallest brain a person could have.
Has anyone ever had a brain the size of a pea? If so, what fills up the rest of the space in their head?