Beefbisquit
Well-Known Member
An elephant has a brain the size of a walnut, a whale only a little bigger. Dolphins have a bigger brain than humans.
http://en.wikipedia.org/wiki/Elephant_cognition#Brain_size_at_birth_relative_to_adult_brain_sizeElephants are amongst the world's most intelligent species. With a mass of just over 5 kg (11 lb), elephant brains are larger than those of any other land animal, and although the largest whales have body masses twenty-fold those of a typical elephant, whale brains are barely twice the mass of an elephant's brain. The elephant's brain is similar to that of humans in terms of structure and complexitysuch as the elephant's cortex having as many neurons as a human brain,[SUP][1][/SUP] suggesting convergent evolution.[SUP][2][/SUP]
Brain size at birth relative to adult brain size[edit]
Like humans, elephants must learn behavior as they grow up. They are not born with the instincts of how to survive.[SUP][24][/SUP] Elephants have a very long period in their lives for learning, lasting for around ten years. One comparative way to try to gauge intelligence is to compare brain size at birth to the fully developed adult brain. This indicates how much learning a species accumulates while young. The majority of mammals are born with a brain close to 90% of the adult weight,[SUP][24][/SUP] while Humans are born with 28%,[SUP][24][/SUP] bottlenose dolphins with 42.5%,[SUP][25][/SUP] chimpanzees with 54%,[SUP][24][/SUP] and elephants with 35%.[SUP][26][/SUP] This indicates that elephants have the highest amount of learning to undergo next to humans, and behavior is not mere instinct but must be taught throughout life. It should be noted that instinct is quite different from learned intelligence. Parents will teach their young how to feed, use tools and learn their place in the highly complex elephant society. The cerebrum temporal lobes, which function as storage of memory, are much larger than those of a human.[SUP][24][/SUP]
While the brain of the elephant is the largest in size among the land mammals, it actually only occupies a small area at the back of the skull. However, in proportion to the size of the body, the elephant brain is smaller than the human brain. Despite this, the elephant is one of the only animals along with all apes (including ourselves), sperm whales and a few other creatures who has a large brain relative to body size.
"Brain size gives a rough measure of mental flexibility--some say intelligence--and large mammalian brains are associated with complex sociality"
http://elephant.elehost.com/About_Elephants/Anatomy/The_Brain/the_brain.html