A golden spiral over lay on a human brain. It looks coincide with a human brain evolution. At the beginning of the spiral, there is the "pineal gland". Is the pineal gland the first and the oldest brain?
One more thing. Did you watch a movie "Pi"? It's a movie about mathematics and a quest for the "truth". At the end of the movie, Max Cohen, a leading character of the movie, screwed a side of head using electric drill. I didn't understand well why do that and why the side of head. But now I understand maybe it is because to access a center of the spiral.