People generally don't recognize how long it takes to conceive, publish, and write a book.

You innovate in ways that stoke your economy. Because innovations in science and technology are the engines of 21st century economies.

Italy valued cathedrals while Spain valued explorers. So worldwide, five times as many people speak Spanish than Italian.

I am proud to be part of a species where a subset of its members willingly put their lives at risk to push the boundaries of our existence.

People think about life from day-to-day rather than thinking about life as something that invents a new kind of tomorrow.

I can't think that leaving Earth once is enough.

I like seeing how people have succeeded when others would have presumed they would have failed, and others just go along with whatever everyone else does.