WhenIWasYourAge: We had to open all doors by ourselves. None of them knew we were coming.

What do you call those knobby things on doors that help you open them?

America has an economy reversing relative to other nations in the world. And I want to turn that around. And one way I know to turn it around is to get everyone excited about what it is to innovate again.

When your reasons for believing something are justified ad hoc, you are left susceptible to further discoveries undermining the rationale for that belief.

People like it when they understand something that they previously thought they couldn't understand. It's a sense of empowerment.

Three and a half million years ago our ancestors - yours and mine - left these traces [indicates footprints]. We stood up and parted ways from them. Once we were standing on two feet, our eyes were no longer fixated on the ground. Now, we were free to look up and wonder.

The good thing about science is that it's true whether or not you believe in it.