I have this notion that computers will never be able to mimic the human brain because the fundamental element of a computer is binary - 1 or 0 - I don't think human problems can be reduced to a 1 or 0 because the problem definitions get stuck and the solutions are always in between. Anyway, here is an interesting topic. HTM - hierarchical Temporal Memory. I wrote a program to calculate the time since death for Deer using neural networks, which was rather simple. So this hit home.
W7IY in 1922 QST: http://nrcdxas.org/articles/Beverage0182.pdf