Quantum Mechanics

One cannot predict the future exactly if one cannot even measure the present exactly.

Stephen Hawking – A Brief History of Time

Time travel used to be thought of as just science fiction, but Einstein’s general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

Stephen Hawking – A Brief History of Time

The increase of disorder or entropy is what distinguishes the past from the future, giving a direction to time.

Stephen Hawking – A Brief History of Time

It is not necessary to invoke God to light the blue torch paper and set the universe going.

Stephen Hawking – A Brief History of Time

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the universe. That makes us something very special.

Stephen Hawking – A Brief History of Time