We've heard all about the heart this week, what about another aspect of your anatomy?
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The human brain is a web of a hundred billion neurons, maybe as many as two hundred billion, with trillions of axons and dendrites exchanging quadrillions of messages by way of at lest fifty different chemical transmitters. The organ with which we observe and make sense the universe is, by a comfortable margin, the most complex object we know of in that universe.
And yet, it's also a lump of meat.
-- Jonathan Franzen, How to be Alone