“The human brain is without any doubt the most complexly organized form of matter in the universe. The brain is made up off 100 billion neurons or nerve cells. It has been calculated that the number of possible permutations and combinations of the brain activity exceeds the amount of elementary particles in the universe. This gives you an idea of the staggering complexity one is faced with when trying to understand the brain.”
Vilayanur S. Ramachandran – Wikipedia
University of California, San Diego