Is there water still on Mars? I don't have a view on that because we don't have good data to answer that question. One of the biggest mistakes you can make if you're a scientist is to think you know the answer, or wish for a certain answer, before you actually have it.

The rocks, to a great extent, look swept clean. It's a much cleaner surface than what we had a right to hope for.

We didn't know if the rover could climb up or down the hills of the crater.

I can't ever remember not wanting to be a scientist.

Having been given that public trust, we have a responsibility to share with the public.

My style of leadership is to lead with the lightest touch that I possibly can.

There's no way to actually turn the rover off.