When Kennedy said, 'Let's go to the moon,' we didn't yet have a vehicle that wouldn't kill you on launch. He said we'll land a man on the moon in eight years and bring him back. That was an audacious goal to put forth in front of the American people.

My view is that if your philosophy is not unsettled daily then you are blind to all the universe has to offer.

I'm a little fatigued of adults saying we've got to worry about the kids. And these are the same adults that don't know science and are running things and wielding resources and legislation.

That's the point, to get the people who wouldn't otherwise think to eavesdrop on a conversation that involves science.

Life existed on Earth for nearly four billion years before anything remotely resembling a human being showed up. And even then, when we started to branch off from other apes about 10,000,000 years ago, our ancestors looked pretty different.

Research in education has shown that we remember field trips long into adulthood. I remember visiting the post office in second grade and looking at the sorting machine. I have vivid memories of that, when I don't even remember the name of the teacher who took me.

You know, dark matter matters.