We should not be ashamed of not having answers to all questions yet... I'm perfectly happy staring somebody in the face saying, 'I don't know yet, and we've got top people working on it.' The moment you feel compelled to provide an answer, then you're doing the same thing that the religious community does: providing answers to every possible question.

We're quite happy with our Big Bang description of cosmic origins. But actually, the Big Bang accounts for what happened only after the beginning. The beginning itself, and especially what happened before, remains the biggest mystery of all.

The people talking on their cell phone and following GPS instructions to where grandma's house is saying I don't need space - excuse me, that's how you know where grandma lives, and when to make the left turn.

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

The dinosaurs never saw that asteroid coming. What's our excuse?

Give a kid a book, and you change the world. In a way, even the universe.

No doubt, the most challenging class of questions in science is the origin of things.