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.

The natural resources we've depended on, if the places where they exist are not stable, our own livelihood and our health is put at risk.

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.

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.

We live in uncertain times when it comes to the future of life on Earth.

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.