I think people had somehow gotten the sense that we have explored everything, when that isn't the case. We so know so little about the ocean, and so much of it is being destroyed.

With 'Avatar,' I thought, Forget all these chick flicks and do a classic guys' adventure movie, something in the Edgar Rice Burroughs mold, like John Carter of Mars - a soldier goes to Mars.

It's about human imagination and curiosity. What's out there? What's in the great beyond? What exists at levels we can't see with our five senses?

The universe is like a giant bank vault lock, where the tumblers are constantly moving and once in a while the tumblers line up and you have to listen for the click. So you must be prepared in that moment to step through the door.

I don’t feel that I’m making movies for iPhones. If someone wants to watch it on an iPhone, I’m not going to stop them, especially if they’re paying for it, but I don’t recommend it. I think it’s dumb, when you have characters that are so small in the frame that they’re not visible. I’m trying to make an epic.

Climate change is critical to me because I'm a parent; I feel a sense of responsibility to the future. I'm not going to be around to see its worst effects, which are going to be hitting in the 2030s, '40s, '50s, but my kids will.

I lived in a small town. It was 2,000 people in Canada. A little river that went through it and we swam in the - you know, there was a lot of water around. Niagara Falls was about four or five miles away.