What is the most interesting thing about the brain?

Question: What is the most interesting thing about the brain?
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Asked by to Ian on 17 Jun 2014. This question was also asked by .
- Ian Simpson answered on 17 Jun 2014:
  
  I think the current estimates for cells and connections are quite mind boggling. There are something like 20 billion neurons with about 160 trillion connections between them. About 20% of all of the bodies energy is used by the brain which amounts to about 15W, a dim light bulb 😀

Question: What is the most interesting thing about the brain?