Humans are the worst control system to put in front of a car.

Bad news sells because the amygdala is always looking for something to fear.

By 2020 the U.S. will be short 91,000 doctors. There's no way we can educate enough doctors to make up that shortfall, and other countries are far worse off.

Life on Earth is at an ever-increasing risk of being wiped out by disaster. ... I think the human race doesn't have a future if it doesn't go into space. I therefore want to encourage public interest in space.

The first trillionaire can be made in space.

If someone is always to blame, if every time something goes wrong someone has to be punished, people quickly stop taking risks. Without risks, there can't be breakthroughs.

Go and try to start your own government in the United States today and you'll be squashed very quickly.