Curiously, light-loving green plants reject the Sun's green light, reflecting it back at you, which is why they look green.

Who you are, where you've been and what you've done is all up here, captured and preserved in your memories. If you lost that - the story of your own origins - you'd lose your identity, your sense of self.

When we try to look farther into the universe we come to what appears to be the end of space but actually it's the beginning of time.

I think the best thing a parent can do, when raising a child, is simply get out of their way.

We need more science in the world. Train me.

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

We went to the moon and discovered Earth.