It is hard to imagine how free will can operate if our behavior is determined by physical law, so it seems that we are no more than biological machin… - Stephen Hawking

The discovery that the universe was expanding was one of the great intellectual revolutions of the twentieth century.

But the idea that God might want to change his mind is an example of the fallacy, pointed out by St. Augustine, of imagining God as a being existing in time: time is a property only of the universe that God created.

As those who have seen Jurassic Park will know, this means a tiny disturbance in one place, can cause a major change in another. A butterfly flapping its wings can cause rain in Central Park, New York. The trouble is, it is not repeatable. The next time the butterfly flaps its wings, a host of other things will be different, which will also influence the weather. That is why weather forecasts are so unreliable.