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

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.

I think the hardest part about my job is the best part of my job - the travel.

I'm glad I'm inspiring somebody.

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

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.

Running is my addiction. It's always present. I'm constantly thinking about my next run.