The actual average size of the Neanderthal brain—was not significantly greater than modern humans.
Only at birth. They grew bigger later in life.
http://newswatch.nationalgeographic.com/2008/09/09/neanderthal/?q=/2008/09/neanderthal.html
Only at birth. They grew bigger later in life.
http://newswatch.nationalgeographic.com/2008/09/09/neanderthal/?q=/2008/09/neanderthal.html