A Zero-gravity Flight Is A First Step

The Real Challenge Is To Work Out What Aliens Might Actually Be Like.

Plagiarism Saves Time.

If You Lined Up All The Cars In The World End To End, Someone Would Try To Pass Them.

My First Popular Book, 'a Brief History Of Time,' Aroused A Great Deal Of Interest, But Many Found It Difficult To Understand.

One Could Imagine Such Technology Outsmarting Financial Markets, Out-inventing Human Researchers, Out-manipulating Human Leaders, And Developing Weapons We Cannot Even Understand.