Link: Thick Heads Win!

So, I'm listening to a class taught by Robert Wyman at Yale (free to download online) and he mentioned that 40% of Neanderthal skulls found are bashed in.  Got me thinking about how I had heard that a correlation has been noticed been the 'invention' of stone tools and the thickness of hominid skulls.  Two neato articles about this:

http://www2.uiowa.edu/dragon/Natural%20History%20Magazine%20%20Feature.htm
http://www.cnn.com/2004/TECH/science/02/12/coolsc.thickskulls/index.html