Well, like Jeffrey Schweitzer said, Neanderthals had larger brains than humans (if I recall, theie average was about 15% larger than our modern-day average). read more
According to the Cornell University Bert Wilder Brain Collection, serial killer Edward Ruloff had one of the largest recorded brains, and is on display at the University, with 7 noted scholar’s brains as well. read more
6: The Human Brain Is the Biggest Brain - The biggest brain is the human brain -- or so you might think, since we're smart. Take a look at animal brains and see which brain is the biggest brain. read more