Our universe is believed to have begun with the Big Bang, 10-15 billion years ago. Its degree of complexity at and soon after 
that moment was next to nil. Then why and how has the cosmic complexity gone on increasing? In fact, it is increasing exponentially fast. The explanation can be traced ultimately to the fact that the universe has been expanding all the time.
7.1 Quantum Mechanics
All phenomena are governed by the laws of quantum mechanics. Quantum theory has been remarkably successful in explaining a vast range of observations. It is also highly counterintuitive. We accept it because there is no better theory for understanding natural phenomena. In any case, there is no reason why the laws of Nature should not be counterintuitive to humans. There is nothing special about us, except that we possess intelligence and consciousness. In the history of the cosmos, we emerged on the scene very recently, whereas the laws of Nature have been there all the time. Read the full story
