Very interesting article about quantum effects on the macro level in the June Scientific American. Some of the possibilities are very interesting: bird migration might be a quantum effect; photosynthesis might achieve it's near perfect efficiency due to quantum entanglement. Most interesting: gravity itself might not be a "force" in the sense that electromagnetism and the strong force are, but might be an emergent property of quantum mechanics at the macro (universe) level.
A mind is never happier than when it's blown.