I'm really worried about what the world is going to be like when my daughters are young women, [when] they are young leaders or mothers or businesspeople - whatever they're going to be. I'm afraid they're going to have a less healthy and less biologically rich planet.

The challenge is that we live in a time where there's a lot of crap on television.

I think a human animal is far more wild and unpredictable and dangerous and destructive than any other animal.

We are not far away from the point of no return when it comes to life on earth, and we have some radical choices to make.

We live in a time where we have more extinction happening on our planet than since the dinosaurs were wiped out 50 million years ago.

To be with another scientist and make a discovery and share that with a global audience, or working with bear biologists in Alaska, by helicopter - [it's] really what I've given my whole life to. And I get to do that just about every week.

It's the best - combining the mediums of television, documentary, and books, to give you this transmedia experience for kids, for families, and for teachers.