“Molecular Insights into Human Brain Evolution”, 2005-03-15 (; backlinks; similar):
As a species, we pride ourselves on the uniqueness of our brain. Relative to our body size, the human brain is bigger than that of any other animal. It may also contain unique structures and patterns of organization that presumably underlie our intelligence and ability to manipulate our environment. But how did our unique brain originate, and under what selective pressures did it evolve? Some of the answers may lie in the genetic differences that researchers are now uncovering between us and our closest relatives.
ToC: Costs and Benefits · The Genetics of Human Brain Evolution · Enter Glutamate Dehydrogenase · Gene Expression · Scratching at the Surface · Further Reading