You know, dark matter matters.

I want to create the airplane that flies in the rarified atmosphere of Mars. This is what galvanizes a generation to want to become scientists and engineers in the first place, not we need a scientist to develop a plane that's 20 percent more fuel-efficient than the one your parents flew.

There is no true understanding of Biology without Chemistry. And there's no true understanding of Chemistry without Physics.

There's no greater sign of the failure of the American educational system than the extent to which Americans are distracted by the possibility that Earth might end on December 21, 2012. It's a profound absence of awareness of the laws of physics and how nature works. So they're missing some science classes in their training in high school or in college that would empower them to understand and to judge when someone else is basically just full of it. Science is like an inoculation against charlatans who would have you believe whatever it is they tell you.

The iron from that meteorite and the iron from your blood have common origin in the core of a star.

Thomas Jefferson basically secularized Jesus.

We live in the kind of society where, in almost all cases, hard work is rewarded.