I got to wondering about the development of the human brain, and the consequent development of human intelligence (and to an extent the mind). I googled the question and after reading several articles, was left not much the wiser in regard to the development of 'intelligence'. Part of my problem is not knowing what 'intelligence' is. However, I think what I mean is that today's body of human knowledge is quite extensive. A smart well educated man today can know a lot of facts and can entertain rather sophisticated ideas about the nature of the external and internal environments. A scientist can know quantum theory, advanced cosmological concepts, deep knowledge about biology and microbiology, ever increasing understanding of the functions of the brain and mind itself. This knowledge, this mode of thinking, is far in advance of the mind of a man of say 10,000 years ago. Yet how has the brain changed in that time to facilitate this? My reading tells me that the size of the human brain increased over the course of several millions of years until around 10,000 years ago when brain size began to decrease slightly. Today's brain appears to be about the same size, or slightly smaller than, the brain of 10,000 years ago. Yet I found little to describe how the internal structures of the brain might have changed in that time. Broadly speaking, I got the impression that the brain has not changed much other than size in the past 10,0000 years. The essential structures appear to have been well in place by that time. Presumably then, the potential of a human brain to know and understand the knowledge that we have today was present 10,000 years ago. That raises some intriguing questions about the mind. But I suppose first I need to know if that core fact is true. Has the human brain changed in the past 10-20,000 years? Or more exactly I guess, does science have a view on when the human brain developed its current form and function?