I think people are dreaming big because they have the tools to dream big. I hope that people are dreaming big because it makes them feel good about their lives.

My father, who grew up picking olives on the Greek island of Lesbos, was a doctor. So my family expected me to become a physician.

We live in a world bathed in 5,000 times more energy than we consume as a species in the year, in the form of solar energy.

Space is not a two-year objective. It used to be, in the early '60's, we had this eye candy of Mercury and Gemini and Apollo and every year we would do something more and more and it met those needs. But the easy stuff has been done.

I ended up realizing that NASA was unlikely to get me into space, or get me to the moon or beyond, and I needed some other way to drive this.

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

I think people are dreaming big because they have the tools to dream big. I hope that people are dreaming big because it makes them feel good about their lives.