My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.
Stephen HawkingYou may see a cup of tea fall off a table and break into pieces on the floor... But you will never see the cup gather itself back together and jump back on the table. The increase of disorder, or entropy, is what distinguishes the past from the future, giving a direction to time.
Stephen HawkingThe increase of disorder or entropy with time is one example of what is called an arrow of time, something that distinguishes the past from the future, giving a direction to time.
Stephen Hawking